/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:35:23,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:35:23,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:35:23,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:35:23,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:35:23,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:35:23,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:35:23,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:35:23,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:35:23,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:35:23,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:35:23,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:35:23,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:35:23,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:35:23,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:35:23,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:35:23,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:35:23,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:35:23,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:35:23,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:35:23,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:35:23,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:35:23,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:35:23,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:35:24,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:35:24,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:35:24,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:35:24,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:35:24,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:35:24,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:35:24,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:35:24,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:35:24,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:35:24,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:35:24,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:35:24,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:35:24,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:35:24,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:35:24,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:35:24,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:35:24,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:35:24,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:35:24,075 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:35:24,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:35:24,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:35:24,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:35:24,078 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:35:24,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:35:24,079 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:35:24,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:35:24,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:35:24,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:35:24,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:35:24,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:35:24,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:35:24,081 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:35:24,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:35:24,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:35:24,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:35:24,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:35:24,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:35:24,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:35:24,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:35:24,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:35:24,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:35:24,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:35:24,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:35:24,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:35:24,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:35:24,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:35:24,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:35:24,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:35:24,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:35:24,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:35:24,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:35:24,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:35:24,605 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:35:24,606 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-21 12:35:24,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2d54b975/4c023a16d55643a59b3e2ca7af352edb/FLAG00952a03b [2020-09-21 12:35:25,175 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:35:25,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-21 12:35:25,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2d54b975/4c023a16d55643a59b3e2ca7af352edb/FLAG00952a03b [2020-09-21 12:35:25,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2d54b975/4c023a16d55643a59b3e2ca7af352edb [2020-09-21 12:35:25,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:35:25,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:35:25,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:25,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:35:25,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:35:25,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:25,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774a9bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25, skipping insertion in model container [2020-09-21 12:35:25,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:25,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:35:25,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:35:25,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:25,900 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:35:25,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:25,951 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:35:25,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25 WrapperNode [2020-09-21 12:35:25,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:25,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:35:25,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:35:25,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:35:26,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:26,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:26,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:26,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:26,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:26,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:26,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... [2020-09-21 12:35:26,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:35:26,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:35:26,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:35:26,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:35:26,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:35:26,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:35:26,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:35:26,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:35:26,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:35:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:35:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:35:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:35:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:35:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 12:35:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:35:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:35:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:35:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:35:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:35:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:35:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:35:26,504 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:35:26,505 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 12:35:26,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:26 BoogieIcfgContainer [2020-09-21 12:35:26,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:35:26,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:35:26,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:35:26,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:35:26,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:35:25" (1/3) ... [2020-09-21 12:35:26,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bacba5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:26, skipping insertion in model container [2020-09-21 12:35:26,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:25" (2/3) ... [2020-09-21 12:35:26,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bacba5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:26, skipping insertion in model container [2020-09-21 12:35:26,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:26" (3/3) ... [2020-09-21 12:35:26,525 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-21 12:35:26,535 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:35:26,545 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:35:26,566 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:35:26,594 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:35:26,594 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:35:26,594 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:35:26,595 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:35:26,595 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:35:26,595 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:35:26,595 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:35:26,595 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:35:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-21 12:35:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 12:35:26,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:26,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:26,624 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:26,631 INFO L82 PathProgramCache]: Analyzing trace with hash -474003824, now seen corresponding path program 1 times [2020-09-21 12:35:26,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:26,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142956361] [2020-09-21 12:35:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:26,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:26,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:26,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:27,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:27,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:35:27,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:35:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-09-21 12:35:27,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:35:27,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:27,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:35:27,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:27,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:27,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:27,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:27,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:35:27,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:27,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:27,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:27,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:27,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142956361] [2020-09-21 12:35:27,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:27,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:35:27,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850895355] [2020-09-21 12:35:27,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:35:27,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:35:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:27,873 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-09-21 12:35:27,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:27,992 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-09-21 12:35:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:35:27,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 12:35:27,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:28,004 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:35:28,005 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 12:35:28,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 12:35:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 12:35:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 12:35:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 12:35:28,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-09-21 12:35:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:28,054 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 12:35:28,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:35:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 12:35:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 12:35:28,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:28,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:28,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:35:28,057 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 227060754, now seen corresponding path program 1 times [2020-09-21 12:35:28,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:28,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999844386] [2020-09-21 12:35:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:28,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:28,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:35:28,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-09-21 12:35:28,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:35:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:35:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:35:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:28,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:28,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:28,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:28,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:28,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:28,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:28,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:28,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999844386] [2020-09-21 12:35:28,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:28,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:35:28,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612134452] [2020-09-21 12:35:28,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:28,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:28,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:28,503 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-09-21 12:35:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:28,621 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-09-21 12:35:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:35:28,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-21 12:35:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:28,623 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:35:28,623 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 12:35:28,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 12:35:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 12:35:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 12:35:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-21 12:35:28,632 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-09-21 12:35:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:28,633 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-21 12:35:28,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-21 12:35:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 12:35:28,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:28,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:28,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:35:28,634 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:28,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash -807995440, now seen corresponding path program 1 times [2020-09-21 12:35:28,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:28,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205532589] [2020-09-21 12:35:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:28,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:28,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:29,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:29,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:35:29,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:29,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-09-21 12:35:29,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:29,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:35:29,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:35:29,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:35:29,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:29,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:29,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:29,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:29,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:29,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:29,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:29,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:29,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:29,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:29,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:29,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:35:29,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205532589] [2020-09-21 12:35:29,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:29,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:35:29,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756495566] [2020-09-21 12:35:29,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:29,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:29,485 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-09-21 12:35:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:29,616 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-21 12:35:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:35:29,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 12:35:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:29,617 INFO L225 Difference]: With dead ends: 42 [2020-09-21 12:35:29,617 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 12:35:29,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 12:35:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-09-21 12:35:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 12:35:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-09-21 12:35:29,625 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-09-21 12:35:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:29,625 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-09-21 12:35:29,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-09-21 12:35:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 12:35:29,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:29,626 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] [2020-09-21 12:35:29,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:35:29,627 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash 483863630, now seen corresponding path program 1 times [2020-09-21 12:35:29,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:29,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095002759] [2020-09-21 12:35:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:29,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:29,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:30,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:30,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:35:30,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:30,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:35:30,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:30,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:35:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:35:30,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:30,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:30,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:30,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:30,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:30,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:30,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:30,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:30,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:30,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:30,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:30,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:35:30,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095002759] [2020-09-21 12:35:30,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:30,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:35:30,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217708487] [2020-09-21 12:35:30,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:35:30,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:35:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:35:30,950 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2020-09-21 12:35:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:31,445 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-09-21 12:35:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:35:31,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-09-21 12:35:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:31,449 INFO L225 Difference]: With dead ends: 43 [2020-09-21 12:35:31,450 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 12:35:31,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-09-21 12:35:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 12:35:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-09-21 12:35:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:35:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-09-21 12:35:31,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 21 [2020-09-21 12:35:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:31,466 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-09-21 12:35:31,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:35:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-09-21 12:35:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:35:31,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:31,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:31,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:35:31,468 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:31,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1166432524, now seen corresponding path program 2 times [2020-09-21 12:35:31,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:31,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64564870] [2020-09-21 12:35:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:31,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:31,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:32,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:32,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:35:32,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:35:32,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:35:32,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:32,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:32,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:35:32,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:32,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:32,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:32,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:32,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:32,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:32,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:32,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:32,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:32,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:32,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64564870] [2020-09-21 12:35:32,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:32,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:35:32,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584739794] [2020-09-21 12:35:32,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:35:32,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:35:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:32,541 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 7 states. [2020-09-21 12:35:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:32,708 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-09-21 12:35:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:35:32,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-21 12:35:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:32,713 INFO L225 Difference]: With dead ends: 70 [2020-09-21 12:35:32,713 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 12:35:32,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:35:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 12:35:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2020-09-21 12:35:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:35:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-09-21 12:35:32,725 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2020-09-21 12:35:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:32,725 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-09-21 12:35:32,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:35:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-09-21 12:35:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:35:32,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:32,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:32,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:35:32,727 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash -163832182, now seen corresponding path program 3 times [2020-09-21 12:35:32,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:32,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040951301] [2020-09-21 12:35:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:32,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:33,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:33,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:35:33,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:33,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:35:33,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:33,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 12:35:33,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:35:33,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:35:33,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:34,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:34,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:34,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:34,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 12:35:34,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040951301] [2020-09-21 12:35:34,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:34,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:35:34,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058432985] [2020-09-21 12:35:34,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:35:34,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:35:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:35:34,155 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-09-21 12:35:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:34,844 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-21 12:35:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 12:35:34,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-09-21 12:35:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:34,847 INFO L225 Difference]: With dead ends: 50 [2020-09-21 12:35:34,847 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:35:34,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-21 12:35:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:35:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-09-21 12:35:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 12:35:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-09-21 12:35:34,870 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 25 [2020-09-21 12:35:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:34,871 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-09-21 12:35:34,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:35:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-09-21 12:35:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:35:34,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:34,875 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:35:34,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:35:34,876 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1474600187, now seen corresponding path program 1 times [2020-09-21 12:35:34,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:34,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733567724] [2020-09-21 12:35:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:34,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 12:35:35,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:35,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-09-21 12:35:35,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:35,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:35,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:35:35,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:35,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:35,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:35,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:35,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:35,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 12:35:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:35:35,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:35,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:35,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:35,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:35:35,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:35:35,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733567724] [2020-09-21 12:35:35,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:35,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:35:35,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636201464] [2020-09-21 12:35:35,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:35:35,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:35,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:35:35,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:35:35,820 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 8 states. [2020-09-21 12:35:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:36,024 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-09-21 12:35:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:35:36,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-09-21 12:35:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:36,026 INFO L225 Difference]: With dead ends: 62 [2020-09-21 12:35:36,026 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:35:36,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:35:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:35:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-09-21 12:35:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 12:35:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-21 12:35:36,034 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-09-21 12:35:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:36,035 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-21 12:35:36,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:35:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-21 12:35:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:35:36,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:36,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:36,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:35:36,036 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1912246787, now seen corresponding path program 2 times [2020-09-21 12:35:36,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:36,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463495138] [2020-09-21 12:35:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:35:36,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:36,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-09-21 12:35:36,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:35:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:35:36,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:36,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:36,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:36,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:36,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:36,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:36,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:36,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 12:35:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:35:36,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:35:36,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:35:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 12:35:36,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463495138] [2020-09-21 12:35:36,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:36,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:35:36,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020325242] [2020-09-21 12:35:36,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:35:36,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:35:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:35:36,968 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2020-09-21 12:35:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:37,087 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-09-21 12:35:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:35:37,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-21 12:35:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:37,089 INFO L225 Difference]: With dead ends: 53 [2020-09-21 12:35:37,089 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:35:37,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:35:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:35:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 12:35:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:35:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 12:35:37,097 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-09-21 12:35:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:37,097 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 12:35:37,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:35:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 12:35:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 12:35:37,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:37,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:37,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:35:37,100 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:37,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1316510017, now seen corresponding path program 3 times [2020-09-21 12:35:37,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:37,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175969894] [2020-09-21 12:35:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:35:37,123 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:35:37,124 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:35:37,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:35:37,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:37 BoogieIcfgContainer [2020-09-21 12:35:37,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:37,156 INFO L168 Benchmark]: Toolchain (without parser) took 11616.75 ms. Allocated memory was 148.4 MB in the beginning and 296.2 MB in the end (delta: 147.8 MB). Free memory was 104.8 MB in the beginning and 171.2 MB in the end (delta: -66.4 MB). Peak memory consumption was 81.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:37,157 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:35:37,158 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.30 ms. Allocated memory is still 148.4 MB. Free memory was 104.1 MB in the beginning and 93.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:37,159 INFO L168 Benchmark]: Boogie Preprocessor took 130.09 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.9 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:37,160 INFO L168 Benchmark]: RCFGBuilder took 428.69 ms. Allocated memory is still 204.5 MB. Free memory was 182.1 MB in the beginning and 165.2 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:37,161 INFO L168 Benchmark]: TraceAbstraction took 10639.71 ms. Allocated memory was 204.5 MB in the beginning and 296.2 MB in the end (delta: 91.8 MB). Free memory was 165.2 MB in the beginning and 171.2 MB in the end (delta: -6.0 MB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:37,164 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 148.4 MB. Free memory was 122.9 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 405.30 ms. Allocated memory is still 148.4 MB. Free memory was 104.1 MB in the beginning and 93.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.09 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.9 MB in the beginning and 182.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.69 ms. Allocated memory is still 204.5 MB. Free memory was 182.1 MB in the beginning and 165.2 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10639.71 ms. Allocated memory was 204.5 MB in the beginning and 296.2 MB in the end (delta: 91.8 MB). Free memory was 165.2 MB in the beginning and 171.2 MB in the end (delta: -6.0 MB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i