/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:39:31,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:39:31,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:39:31,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:39:31,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:39:31,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:39:31,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:39:31,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:39:31,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:39:31,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:39:31,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:39:31,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:39:31,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:39:31,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:39:31,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:39:31,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:39:31,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:39:31,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:39:31,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:39:31,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:39:31,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:39:31,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:39:31,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:39:31,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:39:31,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:39:31,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:39:31,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:39:31,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:39:31,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:39:31,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:39:31,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:39:31,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:39:31,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:39:31,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:39:31,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:39:31,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:39:31,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:39:31,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:39:31,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:39:31,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:39:31,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:39:31,626 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:39:31,670 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:39:31,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:39:31,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:39:31,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:39:31,673 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:39:31,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:39:31,674 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:39:31,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:39:31,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:39:31,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:39:31,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:39:31,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:39:31,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:39:31,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:39:31,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:39:31,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:39:31,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:39:31,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:39:31,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:39:31,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:39:31,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:39:31,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:31,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:39:31,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:39:31,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:39:31,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:39:31,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:39:31,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:39:31,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:39:31,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:39:32,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:39:32,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:39:32,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:39:32,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:39:32,049 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:39:32,049 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 16:39:32,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0aff5744/fa7b4a950e71415bb2e437d9975176c5/FLAG23bce189d [2020-08-21 16:39:32,624 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:39:32,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 16:39:32,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0aff5744/fa7b4a950e71415bb2e437d9975176c5/FLAG23bce189d [2020-08-21 16:39:32,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0aff5744/fa7b4a950e71415bb2e437d9975176c5 [2020-08-21 16:39:32,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:39:32,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:39:32,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:32,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:39:32,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:39:32,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:32" (1/1) ... [2020-08-21 16:39:32,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69168dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:32, skipping insertion in model container [2020-08-21 16:39:32,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:32" (1/1) ... [2020-08-21 16:39:32,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:39:33,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:39:33,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:33,214 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:39:33,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:33,364 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:39:33,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33 WrapperNode [2020-08-21 16:39:33,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:33,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:39:33,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:39:33,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:39:33,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... [2020-08-21 16:39:33,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... [2020-08-21 16:39:33,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... [2020-08-21 16:39:33,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... [2020-08-21 16:39:33,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... [2020-08-21 16:39:33,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... [2020-08-21 16:39:33,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... [2020-08-21 16:39:33,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:39:33,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:39:33,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:39:33,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:39:33,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:33,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:39:33,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:39:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:39:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-21 16:39:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-21 16:39:33,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:39:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:39:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:39:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-21 16:39:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-21 16:39:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-21 16:39:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-21 16:39:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-21 16:39:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-21 16:39:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-21 16:39:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-21 16:39:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-21 16:39:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-21 16:39:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-21 16:39:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-21 16:39:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-21 16:39:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 16:39:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-21 16:39:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-21 16:39:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-21 16:39:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-21 16:39:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-21 16:39:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-21 16:39:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-21 16:39:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-21 16:39:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-21 16:39:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-21 16:39:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-21 16:39:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-21 16:39:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:39:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:39:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:39:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:39:33,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:39:33,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:39:33,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:39:33,893 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:39:33,893 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 16:39:33,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:33 BoogieIcfgContainer [2020-08-21 16:39:33,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:39:33,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:39:33,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:39:33,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:39:33,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:32" (1/3) ... [2020-08-21 16:39:33,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49290f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:33, skipping insertion in model container [2020-08-21 16:39:33,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:33" (2/3) ... [2020-08-21 16:39:33,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49290f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:33, skipping insertion in model container [2020-08-21 16:39:33,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:33" (3/3) ... [2020-08-21 16:39:33,907 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 16:39:33,918 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:39:33,925 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:39:33,937 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:39:33,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:39:33,960 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:39:33,960 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:39:33,960 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:39:33,961 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:39:33,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:39:33,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:39:33,961 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:39:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-21 16:39:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 16:39:33,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:33,988 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] [2020-08-21 16:39:33,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-08-21 16:39:34,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:34,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055102705] [2020-08-21 16:39:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 16:39:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:34,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055102705] [2020-08-21 16:39:34,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:34,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:39:34,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407788211] [2020-08-21 16:39:34,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:39:34,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:39:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:39:34,289 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-08-21 16:39:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:34,432 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-08-21 16:39:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:39:34,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 16:39:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:34,451 INFO L225 Difference]: With dead ends: 93 [2020-08-21 16:39:34,451 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 16:39:34,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:39:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 16:39:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 16:39:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 16:39:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-08-21 16:39:34,516 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-08-21 16:39:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:34,517 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-08-21 16:39:34,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:39:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-08-21 16:39:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:39:34,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:34,522 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] [2020-08-21 16:39:34,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:39:34,524 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-08-21 16:39:34,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:34,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152490095] [2020-08-21 16:39:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 16:39:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:34,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152490095] [2020-08-21 16:39:34,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:34,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:39:34,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357013380] [2020-08-21 16:39:34,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:39:34,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:39:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:39:34,695 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-08-21 16:39:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:34,823 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-08-21 16:39:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:39:34,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-21 16:39:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:34,824 INFO L225 Difference]: With dead ends: 78 [2020-08-21 16:39:34,825 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 16:39:34,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:39:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 16:39:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-21 16:39:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 16:39:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-21 16:39:34,835 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-08-21 16:39:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:34,836 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-21 16:39:34,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:39:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-21 16:39:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:39:34,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:34,837 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] [2020-08-21 16:39:34,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:39:34,838 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-08-21 16:39:34,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:34,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935684823] [2020-08-21 16:39:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:34,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 16:39:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:35,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935684823] [2020-08-21 16:39:35,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:35,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:39:35,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839260686] [2020-08-21 16:39:35,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:39:35,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:39:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:39:35,014 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-08-21 16:39:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:35,418 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-08-21 16:39:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:39:35,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-21 16:39:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:35,423 INFO L225 Difference]: With dead ends: 140 [2020-08-21 16:39:35,424 INFO L226 Difference]: Without dead ends: 91 [2020-08-21 16:39:35,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:39:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-21 16:39:35,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-08-21 16:39:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 16:39:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-08-21 16:39:35,443 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-08-21 16:39:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:35,443 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-08-21 16:39:35,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:39:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-08-21 16:39:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:39:35,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:35,445 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] [2020-08-21 16:39:35,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:39:35,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:35,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-08-21 16:39:35,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:35,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806610257] [2020-08-21 16:39:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:35,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:35,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 16:39:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:35,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806610257] [2020-08-21 16:39:35,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:35,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:39:35,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356590250] [2020-08-21 16:39:35,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:39:35,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:39:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:35,561 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-08-21 16:39:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:35,808 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-08-21 16:39:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:39:35,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-21 16:39:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:35,812 INFO L225 Difference]: With dead ends: 136 [2020-08-21 16:39:35,812 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 16:39:35,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:39:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 16:39:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-08-21 16:39:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 16:39:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-08-21 16:39:35,840 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-08-21 16:39:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:35,842 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-08-21 16:39:35,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:39:35,843 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-08-21 16:39:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:39:35,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:35,846 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] [2020-08-21 16:39:35,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:39:35,847 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:35,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:35,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-08-21 16:39:35,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:35,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508430140] [2020-08-21 16:39:35,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 16:39:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:36,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508430140] [2020-08-21 16:39:36,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:36,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 16:39:36,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786365630] [2020-08-21 16:39:36,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:39:36,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:36,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:39:36,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:39:36,035 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-08-21 16:39:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:36,285 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-08-21 16:39:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:39:36,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 16:39:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:36,290 INFO L225 Difference]: With dead ends: 138 [2020-08-21 16:39:36,291 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 16:39:36,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:39:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 16:39:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-08-21 16:39:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 16:39:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-08-21 16:39:36,311 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-08-21 16:39:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:36,311 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-08-21 16:39:36,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:39:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-08-21 16:39:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 16:39:36,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:36,317 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] [2020-08-21 16:39:36,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:39:36,317 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-08-21 16:39:36,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:36,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047518911] [2020-08-21 16:39:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:39:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:36,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047518911] [2020-08-21 16:39:36,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:36,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:39:36,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387820276] [2020-08-21 16:39:36,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:36,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:36,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:36,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:36,405 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-08-21 16:39:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:36,507 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-08-21 16:39:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:39:36,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-21 16:39:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:36,509 INFO L225 Difference]: With dead ends: 124 [2020-08-21 16:39:36,509 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 16:39:36,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:39:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 16:39:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-08-21 16:39:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 16:39:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-21 16:39:36,520 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-08-21 16:39:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:36,521 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-21 16:39:36,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-21 16:39:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 16:39:36,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:36,522 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] [2020-08-21 16:39:36,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:39:36,523 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-08-21 16:39:36,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:36,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161364674] [2020-08-21 16:39:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:39:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:36,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161364674] [2020-08-21 16:39:36,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:36,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:39:36,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406077911] [2020-08-21 16:39:36,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:39:36,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:36,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:39:36,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:36,618 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-08-21 16:39:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:36,776 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-08-21 16:39:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:39:36,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-21 16:39:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:36,777 INFO L225 Difference]: With dead ends: 147 [2020-08-21 16:39:36,778 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 16:39:36,779 INFO L675 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 [2020-08-21 16:39:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 16:39:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-21 16:39:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 16:39:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-08-21 16:39:36,799 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-08-21 16:39:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:36,799 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-08-21 16:39:36,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:39:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-08-21 16:39:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 16:39:36,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:36,802 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] [2020-08-21 16:39:36,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:39:36,803 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-08-21 16:39:36,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:36,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750896580] [2020-08-21 16:39:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 16:39:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 16:39:36,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750896580] [2020-08-21 16:39:36,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:36,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:39:36,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291914256] [2020-08-21 16:39:36,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:39:36,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:39:36,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:39:36,971 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-08-21 16:39:37,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:37,224 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-08-21 16:39:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:39:37,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-21 16:39:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:37,226 INFO L225 Difference]: With dead ends: 107 [2020-08-21 16:39:37,227 INFO L226 Difference]: Without dead ends: 105 [2020-08-21 16:39:37,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:39:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-21 16:39:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-08-21 16:39:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 16:39:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-08-21 16:39:37,237 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-08-21 16:39:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:37,237 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-08-21 16:39:37,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:39:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-08-21 16:39:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 16:39:37,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:37,240 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] [2020-08-21 16:39:37,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:39:37,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-08-21 16:39:37,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:37,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204085775] [2020-08-21 16:39:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:37,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 16:39:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:37,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204085775] [2020-08-21 16:39:37,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:37,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:39:37,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582713844] [2020-08-21 16:39:37,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:39:37,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:37,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:39:37,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:39:37,304 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-08-21 16:39:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:37,500 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-08-21 16:39:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:39:37,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 16:39:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:37,504 INFO L225 Difference]: With dead ends: 209 [2020-08-21 16:39:37,504 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 16:39:37,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:39:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 16:39:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-08-21 16:39:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-21 16:39:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-08-21 16:39:37,528 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-08-21 16:39:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:37,529 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-08-21 16:39:37,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:39:37,529 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-08-21 16:39:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 16:39:37,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:37,531 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] [2020-08-21 16:39:37,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:39:37,531 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:37,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-08-21 16:39:37,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:37,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181365416] [2020-08-21 16:39:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:37,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:37,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 16:39:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:37,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181365416] [2020-08-21 16:39:37,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:37,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:39:37,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656004757] [2020-08-21 16:39:37,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:39:37,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:37,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:39:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:39:37,721 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-08-21 16:39:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:38,192 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-08-21 16:39:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:39:38,192 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-08-21 16:39:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:38,194 INFO L225 Difference]: With dead ends: 240 [2020-08-21 16:39:38,194 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 16:39:38,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:39:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 16:39:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-08-21 16:39:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 16:39:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-08-21 16:39:38,204 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-08-21 16:39:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:38,204 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-08-21 16:39:38,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:39:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-08-21 16:39:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 16:39:38,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:38,206 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] [2020-08-21 16:39:38,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:39:38,206 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-08-21 16:39:38,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:38,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950089132] [2020-08-21 16:39:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:38,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 16:39:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:38,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950089132] [2020-08-21 16:39:38,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:38,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:39:38,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666669378] [2020-08-21 16:39:38,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:39:38,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:38,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:39:38,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:39:38,321 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 11 states. [2020-08-21 16:39:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:38,675 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-21 16:39:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:39:38,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 16:39:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:38,677 INFO L225 Difference]: With dead ends: 202 [2020-08-21 16:39:38,677 INFO L226 Difference]: Without dead ends: 200 [2020-08-21 16:39:38,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:39:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-21 16:39:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-08-21 16:39:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 16:39:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-08-21 16:39:38,688 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-08-21 16:39:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:38,689 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-08-21 16:39:38,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:39:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-08-21 16:39:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 16:39:38,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:38,690 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] [2020-08-21 16:39:38,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:39:38,691 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:38,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-08-21 16:39:38,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:38,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421713250] [2020-08-21 16:39:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:39:38,707 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:39:38,708 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:39:38,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:39:38,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:38 BoogieIcfgContainer [2020-08-21 16:39:38,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:38,733 INFO L168 Benchmark]: Toolchain (without parser) took 5763.23 ms. Allocated memory was 139.5 MB in the beginning and 277.3 MB in the end (delta: 137.9 MB). Free memory was 101.0 MB in the beginning and 136.5 MB in the end (delta: -35.5 MB). Peak memory consumption was 102.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:38,733 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:39:38,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.50 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 100.8 MB in the beginning and 178.0 MB in the end (delta: -77.2 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:38,735 INFO L168 Benchmark]: Boogie Preprocessor took 45.83 ms. Allocated memory is still 201.3 MB. Free memory was 178.0 MB in the beginning and 175.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:38,736 INFO L168 Benchmark]: RCFGBuilder took 486.30 ms. Allocated memory is still 201.3 MB. Free memory was 175.4 MB in the beginning and 148.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:38,737 INFO L168 Benchmark]: TraceAbstraction took 4830.78 ms. Allocated memory was 201.3 MB in the beginning and 277.3 MB in the end (delta: 76.0 MB). Free memory was 147.4 MB in the beginning and 136.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 86.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:38,740 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 392.50 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 100.8 MB in the beginning and 178.0 MB in the end (delta: -77.2 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.83 ms. Allocated memory is still 201.3 MB. Free memory was 178.0 MB in the beginning and 175.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 486.30 ms. Allocated memory is still 201.3 MB. Free memory was 175.4 MB in the beginning and 148.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4830.78 ms. Allocated memory was 201.3 MB in the beginning and 277.3 MB in the end (delta: 76.0 MB). Free memory was 147.4 MB in the beginning and 136.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 86.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 901 SDslu, 1287 SDs, 0 SdLazy, 1834 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred 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: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 209 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 444 NumberOfCodeBlocks, 444 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 45573 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 2/22 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...