/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:30:18,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:30:18,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:30:18,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:30:18,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:30:18,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:30:18,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:30:18,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:30:18,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:30:18,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:30:18,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:30:18,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:30:18,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:30:18,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:30:18,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:30:18,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:30:18,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:30:18,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:30:18,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:30:18,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:30:18,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:30:18,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:30:18,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:30:18,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:30:18,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:30:18,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:30:18,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:30:18,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:30:18,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:30:18,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:30:18,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:30:18,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:30:18,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:30:18,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:30:18,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:30:18,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:30:18,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:30:18,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:30:18,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:30:18,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:30:18,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:30:18,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:30:18,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:30:18,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:30:18,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:30:18,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:30:18,541 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:30:18,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:30:18,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:30:18,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:30:18,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:30:18,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:30:18,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:30:18,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:30:18,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:30:18,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:30:18,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:30:18,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:30:18,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:30:18,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:30:18,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:30:18,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:30:18,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:30:18,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:18,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:30:18,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:30:18,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:30:18,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:30:18,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:30:18,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:30:18,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:30:18,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:30:19,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:30:19,123 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:30:19,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:30:19,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:30:19,133 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:30:19,135 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-21 11:30:19,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1242a5aa/2a0cf5acafc14be0ae8af07ebd2c7dab/FLAG32b044337 [2020-09-21 11:30:19,782 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:30:19,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-21 11:30:19,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1242a5aa/2a0cf5acafc14be0ae8af07ebd2c7dab/FLAG32b044337 [2020-09-21 11:30:20,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1242a5aa/2a0cf5acafc14be0ae8af07ebd2c7dab [2020-09-21 11:30:20,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:30:20,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:30:20,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:20,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:30:20,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:30:20,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee4d01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20, skipping insertion in model container [2020-09-21 11:30:20,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:30:20,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:30:20,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:20,505 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:30:20,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:20,632 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:30:20,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20 WrapperNode [2020-09-21 11:30:20,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:20,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:30:20,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:30:20,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:30:20,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:30:20,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:30:20,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:30:20,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:30:20,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:30:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:30:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:30:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:30:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:30:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:30:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:30:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:30:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:30:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:30:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:30:20,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:30:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:30:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:30:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:30:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:30:20,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:30:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:30:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:30:21,111 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:30:21,111 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 11:30:21,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:21 BoogieIcfgContainer [2020-09-21 11:30:21,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:30:21,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:30:21,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:30:21,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:30:21,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:30:20" (1/3) ... [2020-09-21 11:30:21,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4590ab27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:21, skipping insertion in model container [2020-09-21 11:30:21,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (2/3) ... [2020-09-21 11:30:21,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4590ab27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:21, skipping insertion in model container [2020-09-21 11:30:21,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:21" (3/3) ... [2020-09-21 11:30:21,126 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-09-21 11:30:21,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:30:21,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:30:21,166 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:30:21,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:30:21,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:30:21,193 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:30:21,193 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:30:21,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:30:21,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:30:21,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:30:21,193 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:30:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 11:30:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:30:21,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:21,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-09-21 11:30:21,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814431861] [2020-09-21 11:30:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,389 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,390 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,390 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,390 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:30:21,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:30:21,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 11:30:21,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,484 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,485 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,485 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,486 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:21,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,503 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,503 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,504 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,504 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:21,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:21,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:30:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:21,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814431861] [2020-09-21 11:30:21,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:21,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:30:21,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080286236] [2020-09-21 11:30:21,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:30:21,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:30:21,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:30:21,549 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-09-21 11:30:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:21,685 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-09-21 11:30:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:30:21,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 11:30:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:21,699 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:30:21,699 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:30:21,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:30:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:30:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 11:30:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:30:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-09-21 11:30:21,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-09-21 11:30:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:21,756 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-09-21 11:30:21,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:30:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-09-21 11:30:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:30:21,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:21,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:30:21,759 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-09-21 11:30:21,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618744681] [2020-09-21 11:30:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,832 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,832 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,832 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,833 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:30:21,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:30:21,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:21,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:30:21,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:30:21,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,916 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,917 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,917 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,917 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,930 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,930 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,931 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,931 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:21,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:21,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:21,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:21,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618744681] [2020-09-21 11:30:21,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:21,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:30:21,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894412306] [2020-09-21 11:30:21,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:21,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:21,944 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-09-21 11:30:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,115 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-21 11:30:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:30:22,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-21 11:30:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,118 INFO L225 Difference]: With dead ends: 45 [2020-09-21 11:30:22,118 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:30:22,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:30:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:30:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 11:30:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:30:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-21 11:30:22,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-09-21 11:30:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,140 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-21 11:30:22,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-21 11:30:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:30:22,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:22,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:30:22,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-09-21 11:30:22,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424252241] [2020-09-21 11:30:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,293 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,296 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,297 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,297 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:30:22,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 11:30:22,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:30:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:30:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:30:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:22,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,431 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,431 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,431 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,431 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,441 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,441 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,442 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,442 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:22,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:22,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:22,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:30:22,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424252241] [2020-09-21 11:30:22,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:22,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 11:30:22,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337906988] [2020-09-21 11:30:22,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:30:22,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:30:22,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:30:22,452 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-09-21 11:30:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,650 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-21 11:30:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:30:22,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-09-21 11:30:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,652 INFO L225 Difference]: With dead ends: 39 [2020-09-21 11:30:22,652 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:30:22,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:30:22,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:30:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-21 11:30:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 11:30:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-21 11:30:22,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-09-21 11:30:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,662 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-21 11:30:22,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:30:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-21 11:30:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:30:22,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,663 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:22,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:30:22,664 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-09-21 11:30:22,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239331682] [2020-09-21 11:30:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,750 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,750 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,751 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,751 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:30:22,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 11:30:22,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:30:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:30:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:30:22,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,832 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,832 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,832 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,832 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,840 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,840 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,840 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,841 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:22,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:22,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239331682] [2020-09-21 11:30:22,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:22,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:30:22,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781947500] [2020-09-21 11:30:22,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:30:22,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:30:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:30:22,850 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-09-21 11:30:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:23,023 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 11:30:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:30:23,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-21 11:30:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:23,025 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:30:23,025 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:30:23,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:30:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:30:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-21 11:30:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:30:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-09-21 11:30:23,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-09-21 11:30:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:23,033 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-09-21 11:30:23,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:30:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-09-21 11:30:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:30:23,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:23,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:23,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:30:23,035 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-09-21 11:30:23,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:23,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379568807] [2020-09-21 11:30:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,081 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,081 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,082 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:30:23,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:30:23,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:30:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:23,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,179 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,179 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,180 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,180 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:23,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:30:23,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,190 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,190 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,190 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,190 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:23,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:23,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379568807] [2020-09-21 11:30:23,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:23,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:30:23,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090328108] [2020-09-21 11:30:23,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:23,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:23,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:23,203 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-09-21 11:30:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:23,325 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-09-21 11:30:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:30:23,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-21 11:30:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:23,327 INFO L225 Difference]: With dead ends: 55 [2020-09-21 11:30:23,327 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:30:23,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:30:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-21 11:30:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:30:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-21 11:30:23,335 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-09-21 11:30:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:23,335 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-21 11:30:23,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-21 11:30:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:30:23,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:23,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:23,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:30:23,338 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-09-21 11:30:23,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:23,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617059688] [2020-09-21 11:30:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:30:23,376 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:30:23,376 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:30:23,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:30:23,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:30:23 BoogieIcfgContainer [2020-09-21 11:30:23,403 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:30:23,407 INFO L168 Benchmark]: Toolchain (without parser) took 3243.81 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 102.3 MB in the beginning and 91.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 106.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:23,408 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:30:23,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 463.06 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 101.7 MB in the beginning and 180.8 MB in the end (delta: -79.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:23,410 INFO L168 Benchmark]: Boogie Preprocessor took 52.22 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 178.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:23,411 INFO L168 Benchmark]: RCFGBuilder took 430.09 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 161.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:23,412 INFO L168 Benchmark]: TraceAbstraction took 2285.90 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 160.7 MB in the beginning and 91.8 MB in the end (delta: 69.0 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:23,415 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 463.06 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 101.7 MB in the beginning and 180.8 MB in the end (delta: -79.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.22 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 178.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.09 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 161.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2285.90 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 160.7 MB in the beginning and 91.8 MB in the end (delta: 69.0 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i