/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/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:36:39,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:36:39,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:36:39,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:36:39,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:36:39,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:36:39,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:36:39,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:36:39,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:36:39,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:36:39,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:36:39,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:36:39,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:36:39,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:36:39,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:36:39,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:36:39,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:36:39,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:36:39,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:36:39,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:36:39,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:36:39,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:36:39,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:36:39,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:36:39,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:36:39,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:36:39,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:36:39,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:36:39,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:36:39,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:36:39,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:36:39,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:36:39,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:36:39,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:36:39,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:36:39,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:36:39,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:36:39,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:36:39,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:36:39,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:36:39,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:36:39,309 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 12:36:39,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:36:39,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:36:39,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:36:39,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:36:39,338 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:36:39,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:36:39,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:36:39,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:36:39,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:36:39,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:36:39,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:36:39,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:36:39,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:36:39,340 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:36:39,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:36:39,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:36:39,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:36:39,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:36:39,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:36:39,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:36:39,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:36:39,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:36:39,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:36:39,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:36:39,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:36:39,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:36:39,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:36:39,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:36:39,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:36:39,344 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 12:36:39,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:36:39,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:36:39,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:36:39,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:36:39,864 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:36:39,865 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-09-21 12:36:39,946 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3bea09bb/4bbabf6d2f464ea0812b7a3cb63a847c/FLAG6243f9e02 [2020-09-21 12:36:40,566 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:36:40,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-09-21 12:36:40,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3bea09bb/4bbabf6d2f464ea0812b7a3cb63a847c/FLAG6243f9e02 [2020-09-21 12:36:40,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3bea09bb/4bbabf6d2f464ea0812b7a3cb63a847c [2020-09-21 12:36:40,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:36:40,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:36:40,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:40,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:36:40,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:36:40,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:40" (1/1) ... [2020-09-21 12:36:40,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aca6f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:40, skipping insertion in model container [2020-09-21 12:36:40,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:40" (1/1) ... [2020-09-21 12:36:40,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:36:40,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:36:41,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:41,410 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:36:41,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:41,533 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:36:41,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41 WrapperNode [2020-09-21 12:36:41,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:41,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:36:41,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:36:41,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:36:41,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (1/1) ... [2020-09-21 12:36:41,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (1/1) ... [2020-09-21 12:36:41,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (1/1) ... [2020-09-21 12:36:41,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (1/1) ... [2020-09-21 12:36:41,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (1/1) ... [2020-09-21 12:36:41,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (1/1) ... [2020-09-21 12:36:41,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (1/1) ... [2020-09-21 12:36:41,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:36:41,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:36:41,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:36:41,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:36:41,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (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 12:36:41,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:36:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:36:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:36:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:36:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-21 12:36:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-21 12:36:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:36:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:36:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:36:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:36:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:36:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 12:36:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:36:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:36:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:36:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:36:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:36:44,854 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:36:44,855 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:36:44,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:44 BoogieIcfgContainer [2020-09-21 12:36:44,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:36:44,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:36:44,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:36:44,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:36:44,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:36:40" (1/3) ... [2020-09-21 12:36:44,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3559224e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:44, skipping insertion in model container [2020-09-21 12:36:44,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:41" (2/3) ... [2020-09-21 12:36:44,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3559224e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:44, skipping insertion in model container [2020-09-21 12:36:44,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:44" (3/3) ... [2020-09-21 12:36:44,870 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-09-21 12:36:44,882 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:36:44,892 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:36:44,915 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:36:44,945 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:36:44,945 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:36:44,946 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:36:44,946 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:36:44,946 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:36:44,946 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:36:44,946 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:36:44,946 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:36:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-21 12:36:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 12:36:44,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:44,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:44,982 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-09-21 12:36:45,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:45,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523481410] [2020-09-21 12:36:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:45,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:46,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:46,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 12:36:46,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:46,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1460 [2020-09-21 12:36:47,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 12:36:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:36:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-21 12:36:47,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:36:47,567 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-21 12:36:47,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:47,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:47,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:47,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:36:47,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:47,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 12:36:47,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:47,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:47,668 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 12:36:47,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523481410] [2020-09-21 12:36:47,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:47,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-21 12:36:47,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914544300] [2020-09-21 12:36:47,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 12:36:47,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 12:36:47,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:36:47,705 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-09-21 12:36:47,993 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-09-21 12:37:08,290 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-09-21 12:37:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:09,211 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-09-21 12:37:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 12:37:09,213 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-09-21 12:37:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:09,228 INFO L225 Difference]: With dead ends: 92 [2020-09-21 12:37:09,228 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 12:37:09,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-21 12:37:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 12:37:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-21 12:37:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 12:37:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-09-21 12:37:09,298 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-09-21 12:37:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:09,299 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-09-21 12:37:09,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 12:37:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-09-21 12:37:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 12:37:09,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:09,302 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, 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 12:37:09,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:37:09,303 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:09,303 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-09-21 12:37:09,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:09,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501938508] [2020-09-21 12:37:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:09,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:10,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 12:37:10,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:10,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1382 [2020-09-21 12:37:10,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:10,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 12:37:10,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:37:10,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:37:10,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:11,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:11,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:11,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:11,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:11,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 12:37:11,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:11,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:11,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:11,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:11,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:11,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501938508] [2020-09-21 12:37:11,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:11,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 12:37:11,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305917185] [2020-09-21 12:37:11,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 12:37:11,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 12:37:11,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:37:11,314 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-09-21 12:37:11,546 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-09-21 12:37:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:34,547 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-09-21 12:37:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 12:37:34,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-09-21 12:37:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:34,549 INFO L225 Difference]: With dead ends: 65 [2020-09-21 12:37:34,550 INFO L226 Difference]: Without dead ends: 62 [2020-09-21 12:37:34,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-21 12:37:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-21 12:37:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-09-21 12:37:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-21 12:37:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-09-21 12:37:34,569 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-09-21 12:37:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:34,569 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-09-21 12:37:34,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 12:37:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-09-21 12:37:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 12:37:34,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:34,576 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:34,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:37:34,576 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-09-21 12:37:34,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:34,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760985657] [2020-09-21 12:37:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:35,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:35,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 12:37:35,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:35,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-09-21 12:37:35,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 12:37:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:37:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-21 12:37:35,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:36,332 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-21 12:37:36,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:36,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:36,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:36,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:36,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 12:37:36,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:36,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760985657] [2020-09-21 12:37:36,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:36,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 12:37:36,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217722650] [2020-09-21 12:37:36,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 12:37:36,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 12:37:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:37:36,394 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-09-21 12:37:36,694 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 111