/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:38:56,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:38:56,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:38:56,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:38:56,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:38:57,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:38:57,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:38:57,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:38:57,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:38:57,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:38:57,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:38:57,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:38:57,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:38:57,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:38:57,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:38:57,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:38:57,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:38:57,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:38:57,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:38:57,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:38:57,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:38:57,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:38:57,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:38:57,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:38:57,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:38:57,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:38:57,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:38:57,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:38:57,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:38:57,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:38:57,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:38:57,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:38:57,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:38:57,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:38:57,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:38:57,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:38:57,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:38:57,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:38:57,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:38:57,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:38:57,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:38:57,079 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 [2020-09-25 13:38:57,133 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:38:57,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:38:57,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:38:57,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:38:57,137 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:38:57,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:38:57,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:38:57,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:38:57,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:38:57,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:38:57,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:38:57,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:38:57,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:38:57,140 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:38:57,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:38:57,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:38:57,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:38:57,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:38:57,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:38:57,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:38:57,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:38:57,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:38:57,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:38:57,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:38:57,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:38:57,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:38:57,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:38:57,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:38:57,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:38:57,143 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.rcfgbuilder: Size of a code block -> SingleStatement 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:38:57,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:38:57,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:38:57,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:38:57,647 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:38:57,647 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:38:57,649 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 13:38:57,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5c96c8bf/f005cdeb391e4af096eae5e86c363fde/FLAG100eb2c42 [2020-09-25 13:38:58,297 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:38:58,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 13:38:58,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5c96c8bf/f005cdeb391e4af096eae5e86c363fde/FLAG100eb2c42 [2020-09-25 13:38:58,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5c96c8bf/f005cdeb391e4af096eae5e86c363fde [2020-09-25 13:38:58,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:38:58,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:38:58,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:38:58,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:38:58,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:38:58,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:38:58" (1/1) ... [2020-09-25 13:38:58,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fa69d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:58, skipping insertion in model container [2020-09-25 13:38:58,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:38:58" (1/1) ... [2020-09-25 13:38:58,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:38:58,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:38:58,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:38:58,969 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:38:58,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:38:59,011 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:38:59,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59 WrapperNode [2020-09-25 13:38:59,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:38:59,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:38:59,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:38:59,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:38:59,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:38:59,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:38:59,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:38:59,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:38:59,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (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 [2020-09-25 13:38:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:38:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:38:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:38:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 13:38:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:38:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:38:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:38:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:38:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 13:38:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:38:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:38:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:38:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:38:59,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:38:59,465 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:38:59,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:38:59 BoogieIcfgContainer [2020-09-25 13:38:59,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:38:59,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:38:59,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:38:59,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:38:59,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:38:58" (1/3) ... [2020-09-25 13:38:59,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396961b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:38:59, skipping insertion in model container [2020-09-25 13:38:59,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59" (2/3) ... [2020-09-25 13:38:59,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396961b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:38:59, skipping insertion in model container [2020-09-25 13:38:59,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:38:59" (3/3) ... [2020-09-25 13:38:59,481 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-25 13:38:59,494 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:38:59,505 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:38:59,551 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:38:59,598 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:38:59,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:38:59,599 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:38:59,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:38:59,599 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:38:59,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:38:59,600 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:38:59,600 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:38:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-25 13:38:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 13:38:59,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:38:59,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:38:59,648 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:38:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:38:59,654 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-25 13:38:59,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:38:59,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689577219] [2020-09-25 13:38:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:38:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:38:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:38:59,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:38:59,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:38:59,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 13:38:59,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:38:59,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 13:38:59,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:38:59,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:38:59,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:38:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 13:38:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 13:38:59,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:39:00,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:00,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:00,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:00,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:00,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:39:00,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:00,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:00,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:00,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:00,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:00,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689577219] [2020-09-25 13:39:00,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:39:00,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:39:00,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467999994] [2020-09-25 13:39:00,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:39:00,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:39:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:39:00,061 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-09-25 13:39:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:00,182 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-09-25 13:39:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:39:00,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 13:39:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:00,198 INFO L225 Difference]: With dead ends: 70 [2020-09-25 13:39:00,198 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 13:39:00,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:39:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 13:39:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 13:39:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 13:39:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 13:39:00,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-25 13:39:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:00,256 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 13:39:00,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:39:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 13:39:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 13:39:00,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:00,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:00,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:39:00,259 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-25 13:39:00,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:00,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831693892] [2020-09-25 13:39:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:00,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:00,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:00,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:39:00,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:00,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-09-25 13:39:00,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:00,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:00,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:39:00,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 13:39:00,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 13:39:00,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:39:00,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:00,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:00,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:00,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:00,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:39:00,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:00,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:00,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:00,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:00,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:00,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:00,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831693892] [2020-09-25 13:39:00,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:39:00,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 13:39:00,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356584424] [2020-09-25 13:39:00,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 13:39:00,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 13:39:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:39:00,589 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-25 13:39:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:00,703 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 13:39:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 13:39:00,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-25 13:39:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:00,706 INFO L225 Difference]: With dead ends: 42 [2020-09-25 13:39:00,706 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 13:39:00,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:39:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 13:39:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 13:39:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 13:39:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 13:39:00,720 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-25 13:39:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:00,721 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 13:39:00,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 13:39:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 13:39:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 13:39:00,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:00,723 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] [2020-09-25 13:39:00,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:39:00,724 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:00,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:00,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-25 13:39:00,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:00,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594196456] [2020-09-25 13:39:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:00,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:01,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:01,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 13:39:01,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:01,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-09-25 13:39:01,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:01,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:39:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 13:39:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 13:39:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:01,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:01,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:01,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:01,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 13:39:01,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:01,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 13:39:01,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:01,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:01,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:01,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 13:39:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:01,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:01,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 13:39:01,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:01,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:39:01,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:01,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:39:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:01,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 13:39:01,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:39:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:01,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594196456] [2020-09-25 13:39:01,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:01,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 13:39:01,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374535364] [2020-09-25 13:39:01,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:39:01,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:01,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:39:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:39:01,721 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-25 13:39:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:01,878 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-09-25 13:39:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 13:39:01,879 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 13:39:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:01,880 INFO L225 Difference]: With dead ends: 41 [2020-09-25 13:39:01,880 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 13:39:01,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:39:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 13:39:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-25 13:39:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 13:39:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-25 13:39:01,899 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 28 [2020-09-25 13:39:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:01,899 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-25 13:39:01,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:39:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-25 13:39:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 13:39:01,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:01,904 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-25 13:39:01,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:39:01,905 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-25 13:39:01,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:01,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387391194] [2020-09-25 13:39:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:39:01,929 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:39:01,930 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:39:01,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:39:01,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:39:01 BoogieIcfgContainer [2020-09-25 13:39:01,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:39:01,966 INFO L168 Benchmark]: Toolchain (without parser) took 3270.42 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 103.3 MB in the beginning and 145.1 MB in the end (delta: -41.9 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:01,969 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-25 13:39:01,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.46 ms. Allocated memory is still 140.5 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:01,973 INFO L168 Benchmark]: Boogie Preprocessor took 132.12 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 182.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:01,975 INFO L168 Benchmark]: RCFGBuilder took 325.77 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 168.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:01,981 INFO L168 Benchmark]: TraceAbstraction took 2488.64 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 168.2 MB in the beginning and 145.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:01,992 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.46 ms. Allocated memory is still 140.5 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.12 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 182.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.77 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 168.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2488.64 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 168.2 MB in the beginning and 145.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i