/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condaf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:34:39,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:34:39,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:34:39,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:34:39,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:34:39,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:34:39,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:34:39,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:34:39,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:34:39,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:34:39,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:34:39,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:34:39,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:34:39,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:34:39,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:34:39,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:34:39,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:34:39,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:34:39,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:34:39,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:34:39,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:34:39,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:34:39,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:34:39,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:34:39,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:34:39,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:34:39,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:34:39,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:34:39,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:34:39,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:34:39,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:34:39,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:34:39,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:34:39,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:34:39,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:34:39,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:34:39,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:34:39,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:34:39,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:34:39,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:34:39,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:34:39,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:34:39,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:34:39,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:34:39,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:34:39,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:34:39,633 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:34:39,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:34:39,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:34:39,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:34:39,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:34:39,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:34:39,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:34:39,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:34:39,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:34:39,636 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:34:39,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:34:39,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:34:39,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:34:39,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:34:39,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:34:39,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:34:39,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:34:39,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:34:39,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:34:39,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:34:39,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:34:39,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:34:39,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:34:39,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:34:39,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:34:39,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:34:40,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:34:40,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:34:40,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:34:40,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:34:40,128 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:34:40,129 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c [2020-09-21 12:34:40,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bbab8f5d/5970dc51084f4b559fd4544d77f0fcad/FLAGcda079d34 [2020-09-21 12:34:40,762 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:34:40,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condaf.c [2020-09-21 12:34:40,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bbab8f5d/5970dc51084f4b559fd4544d77f0fcad/FLAGcda079d34 [2020-09-21 12:34:41,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bbab8f5d/5970dc51084f4b559fd4544d77f0fcad [2020-09-21 12:34:41,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:34:41,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:34:41,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:41,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:34:41,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:34:41,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784ce183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41, skipping insertion in model container [2020-09-21 12:34:41,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:34:41,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:34:41,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:41,480 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:34:41,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:41,524 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:34:41,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41 WrapperNode [2020-09-21 12:34:41,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:41,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:34:41,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:34:41,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:34:41,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... [2020-09-21 12:34:41,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:34:41,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:34:41,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:34:41,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:34:41,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:34:41,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:34:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:34:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:34:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:34:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:34:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:34:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:34:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:34:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:34:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:34:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:34:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:34:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:34:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:34:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:34:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:34:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:34:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:34:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:34:42,124 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:34:42,124 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 12:34:42,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:42 BoogieIcfgContainer [2020-09-21 12:34:42,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:34:42,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:34:42,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:34:42,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:34:42,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:34:41" (1/3) ... [2020-09-21 12:34:42,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54029cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:42, skipping insertion in model container [2020-09-21 12:34:42,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:41" (2/3) ... [2020-09-21 12:34:42,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54029cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:42, skipping insertion in model container [2020-09-21 12:34:42,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:42" (3/3) ... [2020-09-21 12:34:42,151 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2020-09-21 12:34:42,163 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:34:42,173 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:34:42,195 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:34:42,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:34:42,223 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:34:42,223 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:34:42,223 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:34:42,223 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:34:42,223 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:34:42,223 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:34:42,223 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:34:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-21 12:34:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:34:42,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:42,252 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] [2020-09-21 12:34:42,253 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-09-21 12:34:42,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:42,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741957199] [2020-09-21 12:34:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:42,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:34:43,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:43,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:34:43,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:34:43,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 12:34:43,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:43,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:43,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:34:43,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:43,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:43,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:34:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:43,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:43,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:34:43,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:34:43,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:43,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741957199] [2020-09-21 12:34:43,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:43,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:34:43,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987987857] [2020-09-21 12:34:43,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:34:43,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:34:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:34:43,611 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-21 12:34:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:43,783 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-09-21 12:34:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:34:43,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 12:34:43,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:43,798 INFO L225 Difference]: With dead ends: 60 [2020-09-21 12:34:43,799 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 12:34:43,804 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 12:34:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 12:34:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-21 12:34:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 12:34:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-09-21 12:34:43,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-09-21 12:34:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:43,867 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-09-21 12:34:43,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:34:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-09-21 12:34:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:34:43,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:43,870 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] [2020-09-21 12:34:43,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:34:43,871 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-09-21 12:34:43,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:43,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890292465] [2020-09-21 12:34:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:44,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:34:44,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:44,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-09-21 12:34:44,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:34:44,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:34:44,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:44,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:34:44,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:44,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:44,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:34:44,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:34:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:44,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:44,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:44,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:44,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:34:44,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:44,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:34:44,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:44,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:44,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:44,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890292465] [2020-09-21 12:34:44,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:44,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:34:44,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793701127] [2020-09-21 12:34:44,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:34:44,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:44,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:34:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:34:44,807 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-09-21 12:34:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:45,025 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-09-21 12:34:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:34:45,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 12:34:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:45,027 INFO L225 Difference]: With dead ends: 44 [2020-09-21 12:34:45,027 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:34:45,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:34:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:34:45,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 12:34:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 12:34:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-09-21 12:34:45,051 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-09-21 12:34:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:45,051 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-09-21 12:34:45,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:34:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-09-21 12:34:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:34:45,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:45,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:45,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:34:45,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:45,056 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-09-21 12:34:45,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:45,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637236734] [2020-09-21 12:34:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 12:34:46,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:46,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:34:46,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:34:46,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:34:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:34:46,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:46,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:46,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:46,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:34:46,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:46,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:46,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:46,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:34:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:46,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:34:46,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:46,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:34:46,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637236734] [2020-09-21 12:34:46,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:46,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:34:46,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159948803] [2020-09-21 12:34:46,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:34:46,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:46,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:34:46,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:34:46,205 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2020-09-21 12:34:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:46,410 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-09-21 12:34:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:34:46,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-09-21 12:34:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:46,412 INFO L225 Difference]: With dead ends: 48 [2020-09-21 12:34:46,412 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 12:34:46,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 12:34:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-21 12:34:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 12:34:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-21 12:34:46,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 30 [2020-09-21 12:34:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:46,421 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-21 12:34:46,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:34:46,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-21 12:34:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:34:46,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:46,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:46,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:34:46,423 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-09-21 12:34:46,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:46,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147884923] [2020-09-21 12:34:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:34:46,445 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:34:46,445 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:34:46,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:34:46,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:34:46 BoogieIcfgContainer [2020-09-21 12:34:46,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:34:46,477 INFO L168 Benchmark]: Toolchain (without parser) took 5329.26 ms. Allocated memory was 141.0 MB in the beginning and 244.8 MB in the end (delta: 103.8 MB). Free memory was 102.6 MB in the beginning and 124.8 MB in the end (delta: -22.2 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:46,478 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:34:46,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.45 ms. Allocated memory is still 141.0 MB. Free memory was 101.9 MB in the beginning and 91.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:46,480 INFO L168 Benchmark]: Boogie Preprocessor took 137.26 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 181.7 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:46,481 INFO L168 Benchmark]: RCFGBuilder took 466.68 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 164.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:46,482 INFO L168 Benchmark]: TraceAbstraction took 4329.80 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 163.5 MB in the beginning and 124.8 MB in the end (delta: 38.7 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:46,486 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 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 373.45 ms. Allocated memory is still 141.0 MB. Free memory was 101.9 MB in the beginning and 91.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.26 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 181.7 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 466.68 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 164.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4329.80 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 163.5 MB in the beginning and 124.8 MB in the end (delta: 38.7 MB). Peak memory consumption was 79.1 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] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 [L30] COND TRUE i