/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res1of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:11:47,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:11:47,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:11:47,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:11:47,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:11:47,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:11:47,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:11:47,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:11:47,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:11:47,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:11:47,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:11:47,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:11:47,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:11:47,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:11:47,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:11:47,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:11:47,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:11:47,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:11:47,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:11:47,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:11:47,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:11:47,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:11:47,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:11:47,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:11:47,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:11:47,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:11:47,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:11:47,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:11:47,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:11:47,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:11:47,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:11:47,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:11:47,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:11:47,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:11:47,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:11:47,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:11:47,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:11:47,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:11:47,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:11:47,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:11:47,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:11:47,979 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 [2020-10-12 10:11:48,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:11:48,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:11:48,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:11:48,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:11:48,030 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:11:48,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:11:48,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:11:48,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:11:48,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:11:48,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:11:48,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:11:48,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:11:48,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:11:48,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:11:48,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:11:48,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:11:48,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:11:48,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:11:48,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:11:48,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:11:48,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:11:48,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:48,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:11:48,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:11:48,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:11:48,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:11:48,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:11:48,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:11:48,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:11:48,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:11:48,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:11:48,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:11:48,363 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:11:48,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:11:48,367 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:11:48,367 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1of.c [2020-10-12 10:11:48,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/131c36e58/e902085b5f22411e82787ef14014a66d/FLAG8a73e4626 [2020-10-12 10:11:48,922 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:11:48,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1of.c [2020-10-12 10:11:48,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/131c36e58/e902085b5f22411e82787ef14014a66d/FLAG8a73e4626 [2020-10-12 10:11:49,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/131c36e58/e902085b5f22411e82787ef14014a66d [2020-10-12 10:11:49,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:11:49,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:11:49,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:49,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:11:49,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:11:49,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a0d118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49, skipping insertion in model container [2020-10-12 10:11:49,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:11:49,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:11:49,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:49,583 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:11:49,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:49,626 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:11:49,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49 WrapperNode [2020-10-12 10:11:49,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:49,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:11:49,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:11:49,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:11:49,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (1/1) ... [2020-10-12 10:11:49,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:11:49,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:11:49,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:11:49,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:11:49,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (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 [2020-10-12 10:11:49,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:11:49,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:11:49,876 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:11:49,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:11:49,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:11:49,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:11:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:11:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:11:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:11:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:11:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:11:49,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:11:49,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:11:49,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:11:49,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:11:49,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:11:49,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:11:49,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:11:49,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:11:50,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:11:50,258 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 10:11:50,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:50 BoogieIcfgContainer [2020-10-12 10:11:50,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:11:50,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:11:50,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:11:50,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:11:50,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:11:49" (1/3) ... [2020-10-12 10:11:50,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d11c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:50, skipping insertion in model container [2020-10-12 10:11:50,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:49" (2/3) ... [2020-10-12 10:11:50,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d11c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:50, skipping insertion in model container [2020-10-12 10:11:50,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:50" (3/3) ... [2020-10-12 10:11:50,272 INFO L109 eAbstractionObserver]: Analyzing ICFG res1of.c [2020-10-12 10:11:50,282 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:11:50,290 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:11:50,302 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:11:50,323 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:11:50,324 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:11:50,324 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:11:50,324 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:11:50,324 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:11:50,324 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:11:50,324 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:11:50,325 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:11:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 10:11:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:11:50,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:50,352 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] [2020-10-12 10:11:50,353 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-10-12 10:11:50,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:50,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988551387] [2020-10-12 10:11:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:50,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:51,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:11:51,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:11:51,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-12 10:11:51,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:51,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:11:51,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:11:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:11:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:11:51,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:51,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:51,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:51,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:51,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:51,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:51,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:51,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:51,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:11:51,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:11:51,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:51,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:11:51,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:51,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988551387] [2020-10-12 10:11:51,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:51,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 10:11:51,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768991290] [2020-10-12 10:11:51,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:11:51,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:11:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:11:51,893 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 8 states. [2020-10-12 10:11:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:52,209 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2020-10-12 10:11:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:11:52,211 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-12 10:11:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:52,220 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:11:52,221 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:11:52,225 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 [2020-10-12 10:11:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:11:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 10:11:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:11:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-12 10:11:52,272 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-12 10:11:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:52,272 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-12 10:11:52,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:11:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-12 10:11:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:11:52,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:52,275 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] [2020-10-12 10:11:52,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:11:52,275 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1783482005, now seen corresponding path program 1 times [2020-10-12 10:11:52,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:52,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183400386] [2020-10-12 10:11:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:52,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:53,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:11:53,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:11:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-12 10:11:53,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:53,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:11:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:11:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:53,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:53,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:53,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:53,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:53,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:53,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:53,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:53,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:53,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:53,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:53,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:53,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:53,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:53,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:53,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:53,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:53,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:53,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183400386] [2020-10-12 10:11:53,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:53,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:11:53,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602941679] [2020-10-12 10:11:53,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:11:53,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:53,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:11:53,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:11:53,121 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-10-12 10:11:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:53,334 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-10-12 10:11:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:11:53,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 10:11:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:53,336 INFO L225 Difference]: With dead ends: 68 [2020-10-12 10:11:53,337 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 10:11:53,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:11:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 10:11:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-12 10:11:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:11:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-12 10:11:53,348 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-10-12 10:11:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:53,348 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-12 10:11:53,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:11:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-12 10:11:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:11:53,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:53,350 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] [2020-10-12 10:11:53,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:11:53,350 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash -588182059, now seen corresponding path program 1 times [2020-10-12 10:11:53,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:53,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82237374] [2020-10-12 10:11:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:53,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:11:54,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:11:54,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-12 10:11:54,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:11:54,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:54,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:11:54,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:54,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:54,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:54,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:11:54,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:54,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:54,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:54,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:54,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:54,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:54,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:54,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:54,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:54,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82237374] [2020-10-12 10:11:54,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:54,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:11:54,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017719951] [2020-10-12 10:11:54,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:11:54,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:11:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:11:54,345 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-12 10:11:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:54,564 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-12 10:11:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:11:54,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 10:11:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:54,565 INFO L225 Difference]: With dead ends: 45 [2020-10-12 10:11:54,566 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 10:11:54,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:11:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 10:11:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 10:11:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:11:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 10:11:54,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-10-12 10:11:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:54,574 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 10:11:54,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:11:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 10:11:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:11:54,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:54,576 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] [2020-10-12 10:11:54,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:11:54,576 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:54,577 INFO L82 PathProgramCache]: Analyzing trace with hash -497039913, now seen corresponding path program 1 times [2020-10-12 10:11:54,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:54,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414205640] [2020-10-12 10:11:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:11:56,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:11:56,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1424 [2020-10-12 10:11:56,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:11:56,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:56,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:11:56,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:56,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:56,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:56,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:56,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:56,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:56,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:56,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:56,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:56,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:56,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414205640] [2020-10-12 10:11:56,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:56,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:11:56,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749934710] [2020-10-12 10:11:56,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:11:56,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:11:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:11:56,348 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 13 states. [2020-10-12 10:11:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:56,867 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-12 10:11:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:11:56,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 10:11:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:56,870 INFO L225 Difference]: With dead ends: 55 [2020-10-12 10:11:56,870 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:11:56,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:11:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:11:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-12 10:11:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:11:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-12 10:11:56,880 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 29 [2020-10-12 10:11:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:56,881 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-12 10:11:56,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:11:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-12 10:11:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:11:56,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:56,882 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] [2020-10-12 10:11:56,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:11:56,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1703711335, now seen corresponding path program 1 times [2020-10-12 10:11:56,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:56,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835251863] [2020-10-12 10:11:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:58,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:11:58,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:11:58,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-12 10:11:58,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:11:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:11:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:58,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:58,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:58,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:58,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:58,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:58,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:58,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:58,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:58,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:58,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:58,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:58,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:58,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:58,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:58,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835251863] [2020-10-12 10:11:58,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:58,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:11:58,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373890999] [2020-10-12 10:11:58,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:11:58,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:11:58,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:11:58,856 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 15 states. [2020-10-12 10:11:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:59,965 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-12 10:11:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:11:59,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 10:11:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:59,968 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:11:59,968 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 10:11:59,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:11:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 10:11:59,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-12 10:11:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:11:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-12 10:11:59,978 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 31 [2020-10-12 10:11:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:59,978 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-12 10:11:59,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:11:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-12 10:11:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:11:59,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:59,980 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] [2020-10-12 10:11:59,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:11:59,980 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1191216473, now seen corresponding path program 2 times [2020-10-12 10:11:59,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:59,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404608053] [2020-10-12 10:11:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:01,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:12:01,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:12:01,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-12 10:12:01,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:12:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:01,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:12:01,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:01,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:01,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:01,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:01,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:01,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:01,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:01,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:01,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:01,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:01,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:01,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:01,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:01,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:01,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:01,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404608053] [2020-10-12 10:12:01,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:01,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:12:01,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648594742] [2020-10-12 10:12:01,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:12:01,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:12:01,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:01,508 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-10-12 10:12:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:01,878 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2020-10-12 10:12:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:12:01,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-12 10:12:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:01,882 INFO L225 Difference]: With dead ends: 91 [2020-10-12 10:12:01,883 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 10:12:01,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:12:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 10:12:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2020-10-12 10:12:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:12:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-12 10:12:01,908 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 31 [2020-10-12 10:12:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:01,909 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-12 10:12:01,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:12:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-12 10:12:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:12:01,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:01,916 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] [2020-10-12 10:12:01,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:12:01,917 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash 867941657, now seen corresponding path program 3 times [2020-10-12 10:12:01,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:01,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704490897] [2020-10-12 10:12:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:04,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:12:04,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:12:04,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2509 [2020-10-12 10:12:04,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:12:04,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:12:04,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:04,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:04,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:04,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:04,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:04,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:04,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:04,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:04,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:04,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:04,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:04,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:04,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:04,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704490897] [2020-10-12 10:12:04,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:04,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:12:04,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514388161] [2020-10-12 10:12:04,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:12:04,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:12:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:12:04,667 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 14 states. [2020-10-12 10:12:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:05,130 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-12 10:12:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:12:05,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-12 10:12:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:05,131 INFO L225 Difference]: With dead ends: 66 [2020-10-12 10:12:05,132 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:12:05,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:12:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:12:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 10:12:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:12:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-12 10:12:05,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 31 [2020-10-12 10:12:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:05,142 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-12 10:12:05,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:12:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-12 10:12:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:12:05,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:05,147 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] [2020-10-12 10:12:05,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:12:05,148 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-10-12 10:12:05,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:05,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893816666] [2020-10-12 10:12:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 10:12:05,168 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 10:12:05,169 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 10:12:05,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:12:05,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 10:12:05 BoogieIcfgContainer [2020-10-12 10:12:05,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 10:12:05,208 INFO L168 Benchmark]: Toolchain (without parser) took 15912.59 ms. Allocated memory was 147.3 MB in the beginning and 379.1 MB in the end (delta: 231.7 MB). Free memory was 103.1 MB in the beginning and 344.7 MB in the end (delta: -241.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 10:12:05,214 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.4 MB in the beginning and 120.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-12 10:12:05,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.65 ms. Allocated memory is still 147.3 MB. Free memory was 103.1 MB in the beginning and 92.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-10-12 10:12:05,217 INFO L168 Benchmark]: Boogie Preprocessor took 176.85 ms. Allocated memory was 147.3 MB in the beginning and 206.6 MB in the end (delta: 59.2 MB). Free memory was 92.4 MB in the beginning and 184.0 MB in the end (delta: -91.6 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-12 10:12:05,218 INFO L168 Benchmark]: RCFGBuilder took 458.07 ms. Allocated memory is still 206.6 MB. Free memory was 184.0 MB in the beginning and 165.8 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-10-12 10:12:05,219 INFO L168 Benchmark]: TraceAbstraction took 14940.21 ms. Allocated memory was 206.6 MB in the beginning and 379.1 MB in the end (delta: 172.5 MB). Free memory was 164.8 MB in the beginning and 344.7 MB in the end (delta: -179.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 10:12:05,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.4 MB in the beginning and 120.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.65 ms. Allocated memory is still 147.3 MB. Free memory was 103.1 MB in the beginning and 92.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 176.85 ms. Allocated memory was 147.3 MB in the beginning and 206.6 MB in the end (delta: 59.2 MB). Free memory was 92.4 MB in the beginning and 184.0 MB in the end (delta: -91.6 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 458.07 ms. Allocated memory is still 206.6 MB. Free memory was 184.0 MB in the beginning and 165.8 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14940.21 ms. Allocated memory was 206.6 MB in the beginning and 379.1 MB in the end (delta: 172.5 MB). Free memory was 164.8 MB in the beginning and 344.7 MB in the end (delta: -179.9 MB). There was no memory consumed. 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); [L28] int *b = malloc(sizeof(int)*N); [L30] sum[0] = 0 [L31] i=0 [L31] COND TRUE i