/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=0.3 --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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:31:28,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:31:28,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:31:28,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:31:28,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:31:28,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:31:28,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:31:28,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:31:28,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:31:28,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:31:28,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:31:28,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:31:28,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:31:28,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:31:28,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:31:28,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:31:28,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:31:28,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:31:28,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:31:28,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:31:28,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:31:28,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:31:28,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:31:28,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:31:28,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:31:28,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:31:28,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:31:28,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:31:28,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:31:28,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:31:28,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:31:28,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:31:28,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:31:28,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:31:28,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:31:28,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:31:28,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:31:28,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:31:28,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:31:28,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:31:28,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:31:28,405 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 12:31:28,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:31:28,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:31:28,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:31:28,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:31:28,436 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:31:28,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:31:28,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:31:28,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:31:28,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:31:28,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:31:28,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:31:28,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:31:28,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:31:28,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:31:28,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:31:28,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:31:28,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:31:28,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:31:28,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:31:28,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:31:28,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:31:28,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:28,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:31:28,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:31:28,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:31:28,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:31:28,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:31:28,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:31:28,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:31:28,442 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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;log-additional-information=true; [2020-09-25 12:31:28,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:31:28,927 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:31:28,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:31:28,935 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:31:28,936 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:31:28,938 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 12:31:29,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b48564d6c/0d7c0bfb6d9b43dab1d6002b082834c0/FLAGf1b8b9701 [2020-09-25 12:31:29,581 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:31:29,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 12:31:29,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b48564d6c/0d7c0bfb6d9b43dab1d6002b082834c0/FLAGf1b8b9701 [2020-09-25 12:31:29,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b48564d6c/0d7c0bfb6d9b43dab1d6002b082834c0 [2020-09-25 12:31:29,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:31:29,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:31:29,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:29,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:31:29,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:31:29,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131dba71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29, skipping insertion in model container [2020-09-25 12:31:29,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:31:29,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:31:30,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:30,260 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:31:30,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:30,292 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:31:30,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30 WrapperNode [2020-09-25 12:31:30,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:30,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:31:30,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:31:30,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:31:30,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (1/1) ... [2020-09-25 12:31:30,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (1/1) ... [2020-09-25 12:31:30,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (1/1) ... [2020-09-25 12:31:30,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (1/1) ... [2020-09-25 12:31:30,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (1/1) ... [2020-09-25 12:31:30,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (1/1) ... [2020-09-25 12:31:30,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (1/1) ... [2020-09-25 12:31:30,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:31:30,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:31:30,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:31:30,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:31:30,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (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 12:31:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:31:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:31:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:31:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:31:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:31:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:31:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 12:31:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:31:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:31:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:31:30,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:31:30,763 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:31:30,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:30 BoogieIcfgContainer [2020-09-25 12:31:30,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:31:30,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:31:30,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:31:30,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:31:30,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:31:29" (1/3) ... [2020-09-25 12:31:30,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5297dd33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:30, skipping insertion in model container [2020-09-25 12:31:30,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:30" (2/3) ... [2020-09-25 12:31:30,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5297dd33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:30, skipping insertion in model container [2020-09-25 12:31:30,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:30" (3/3) ... [2020-09-25 12:31:30,809 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-25 12:31:30,835 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:31:30,848 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:31:30,872 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:31:30,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:31:30,903 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:31:30,903 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:31:30,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:31:30,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:31:30,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:31:30,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:31:30,904 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:31:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 12:31:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 12:31:30,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:30,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:30,934 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:30,942 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-25 12:31:30,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:30,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872276098] [2020-09-25 12:31:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:31,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:31,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:31,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:31,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 12:31:31,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:31,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-09-25 12:31:31,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:31,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:31,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:31,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:31,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:31:31,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:31:31,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:31,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:31,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:31,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:31,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:31:31,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:31,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:31,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:31,376 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 12:31:31,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872276098] [2020-09-25 12:31:31,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:31,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:31:31,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125004424] [2020-09-25 12:31:31,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:31,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:31,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:31,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:31,410 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-25 12:31:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:31,508 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-09-25 12:31:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:31:31,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-25 12:31:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:31,523 INFO L225 Difference]: With dead ends: 57 [2020-09-25 12:31:31,523 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 12:31:31,528 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 12:31:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 12:31:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 12:31:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 12:31:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 12:31:31,578 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-25 12:31:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:31,579 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 12:31:31,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 12:31:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 12:31:31,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:31,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:31,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:31:31,581 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:31,582 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-25 12:31:31,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:31,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579006554] [2020-09-25 12:31:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:32,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 12:31:32,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:32,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-09-25 12:31:32,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:32,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 12:31:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:32,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:32,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:32,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:32,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:32,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:32,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:32,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579006554] [2020-09-25 12:31:32,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:32,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:31:32,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324317474] [2020-09-25 12:31:32,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:31:32,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:32,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:31:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:32,387 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-25 12:31:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:32,657 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 12:31:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:31:32,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-25 12:31:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:32,662 INFO L225 Difference]: With dead ends: 60 [2020-09-25 12:31:32,662 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 12:31:32,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-25 12:31:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 12:31:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-25 12:31:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 12:31:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-25 12:31:32,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-25 12:31:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:32,674 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-25 12:31:32,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:31:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-25 12:31:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 12:31:32,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:32,676 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] [2020-09-25 12:31:32,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:31:32,676 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-25 12:31:32,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:32,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430982934] [2020-09-25 12:31:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:32,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 12:31:32,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:32,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-25 12:31:32,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:32,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:32,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 12:31:32,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 12:31:32,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:32,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:32,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:32,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:32,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:32,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:32,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:32,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:32,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430982934] [2020-09-25 12:31:32,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:32,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 12:31:32,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239026369] [2020-09-25 12:31:32,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 12:31:32,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:32,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 12:31:32,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:31:32,914 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-25 12:31:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:33,037 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-25 12:31:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:31:33,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-25 12:31:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:33,039 INFO L225 Difference]: With dead ends: 60 [2020-09-25 12:31:33,040 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 12:31:33,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:31:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 12:31:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 12:31:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 12:31:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-25 12:31:33,047 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-25 12:31:33,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:33,048 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-25 12:31:33,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 12:31:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-25 12:31:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 12:31:33,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:33,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:31:33,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-25 12:31:33,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58922482] [2020-09-25 12:31:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 12:31:33,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-09-25 12:31:33,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 12:31:33,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:33,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:31:33,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:33,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:33,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:33,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 12:31:33,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58922482] [2020-09-25 12:31:33,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:33,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:31:33,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624103130] [2020-09-25 12:31:33,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:31:33,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:31:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:31:33,629 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-25 12:31:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:33,960 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-25 12:31:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:31:33,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 12:31:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:33,962 INFO L225 Difference]: With dead ends: 54 [2020-09-25 12:31:33,962 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 12:31:33,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 12:31:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 12:31:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-25 12:31:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 12:31:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-25 12:31:33,970 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-25 12:31:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:33,970 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-25 12:31:33,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:31:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-25 12:31:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 12:31:33,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:33,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:31:33,972 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-25 12:31:33,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126653631] [2020-09-25 12:31:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 12:31:34,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-09-25 12:31:34,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 12:31:34,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:34,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 12:31:34,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:31:34,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:34,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126653631] [2020-09-25 12:31:34,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 12:31:34,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152134950] [2020-09-25 12:31:34,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 12:31:34,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 12:31:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:31:34,347 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-25 12:31:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,552 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-25 12:31:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 12:31:34,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-25 12:31:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,554 INFO L225 Difference]: With dead ends: 70 [2020-09-25 12:31:34,555 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 12:31:34,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 12:31:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 12:31:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-25 12:31:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 12:31:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 12:31:34,563 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-25 12:31:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,563 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 12:31:34,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 12:31:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 12:31:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 12:31:34,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,565 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:34,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:31:34,566 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-25 12:31:34,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236582448] [2020-09-25 12:31:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 12:31:34,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-09-25 12:31:34,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 12:31:34,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:34,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 12:31:34,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:35,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:35,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:35,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:35,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236582448] [2020-09-25 12:31:35,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:35,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 12:31:35,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389250760] [2020-09-25 12:31:35,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 12:31:35,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:35,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 12:31:35,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 12:31:35,149 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-25 12:31:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:35,462 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-25 12:31:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 12:31:35,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-25 12:31:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:35,464 INFO L225 Difference]: With dead ends: 79 [2020-09-25 12:31:35,464 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 12:31:35,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-09-25 12:31:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 12:31:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 12:31:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 12:31:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-25 12:31:35,490 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-25 12:31:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:35,490 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-25 12:31:35,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 12:31:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-25 12:31:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:31:35,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:35,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:35,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:31:35,493 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-25 12:31:35,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:35,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127790565] [2020-09-25 12:31:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:31:36,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-09-25 12:31:36,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 12:31:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 12:31:36,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:36,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:36,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:36,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:36,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:36,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:36,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127790565] [2020-09-25 12:31:36,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:36,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 12:31:36,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903624586] [2020-09-25 12:31:36,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 12:31:36,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 12:31:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 12:31:36,330 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-25 12:31:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:36,712 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-25 12:31:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 12:31:36,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-25 12:31:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:36,714 INFO L225 Difference]: With dead ends: 87 [2020-09-25 12:31:36,714 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 12:31:36,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 12:31:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 12:31:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-25 12:31:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 12:31:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 12:31:36,722 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-25 12:31:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:36,722 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 12:31:36,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 12:31:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 12:31:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 12:31:36,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:36,724 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:36,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 12:31:36,724 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:36,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-25 12:31:36,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:36,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833924552] [2020-09-25 12:31:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 12:31:36,746 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 12:31:36,746 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 12:31:36,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 12:31:36,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:31:36 BoogieIcfgContainer [2020-09-25 12:31:36,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 12:31:36,778 INFO L168 Benchmark]: Toolchain (without parser) took 6843.11 ms. Allocated memory was 140.5 MB in the beginning and 284.2 MB in the end (delta: 143.7 MB). Free memory was 102.6 MB in the beginning and 241.7 MB in the end (delta: -139.0 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:36,779 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 12:31:36,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.06 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:36,781 INFO L168 Benchmark]: Boogie Preprocessor took 113.64 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 182.9 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:36,782 INFO L168 Benchmark]: RCFGBuilder took 362.97 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:36,783 INFO L168 Benchmark]: TraceAbstraction took 5990.31 ms. Allocated memory was 202.9 MB in the beginning and 284.2 MB in the end (delta: 81.3 MB). Free memory was 169.5 MB in the beginning and 241.7 MB in the end (delta: -72.2 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:36,786 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 353.06 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.64 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 182.9 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.97 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5990.31 ms. Allocated memory was 202.9 MB in the beginning and 284.2 MB in the end (delta: 81.3 MB). Free memory was 169.5 MB in the beginning and 241.7 MB in the end (delta: -72.2 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i