/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/loops/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:54:42,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:54:42,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:54:42,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:54:42,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:54:42,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:54:42,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:54:42,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:54:42,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:54:42,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:54:42,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:54:42,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:54:42,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:54:42,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:54:42,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:54:42,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:54:42,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:54:42,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:54:42,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:54:42,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:54:42,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:54:42,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:54:42,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:54:42,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:54:42,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:54:42,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:54:42,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:54:42,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:54:42,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:54:42,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:54:42,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:54:42,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:54:42,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:54:42,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:54:42,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:54:42,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:54:42,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:54:42,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:54:42,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:54:42,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:54:42,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:54:42,975 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 [2020-10-27 01:54:43,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:54:43,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:54:43,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:54:43,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:54:43,003 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:54:43,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:54:43,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:54:43,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:54:43,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:54:43,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:54:43,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:54:43,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:54:43,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:54:43,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:54:43,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:54:43,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:54:43,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:54:43,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:54:43,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:54:43,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:54:43,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:54:43,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:54:43,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:54:43,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:54:43,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:54:43,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:54:43,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:54:43,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:54:43,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:54:43,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:54:43,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:54:43,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:54:43,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:54:43,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:54:43,438 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:54:43,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2020-10-27 01:54:43,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b550f101b/8a38f9e21dd1483fae6b37c3cf378524/FLAG929e58354 [2020-10-27 01:54:44,230 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:54:44,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/eureka_01-1.c [2020-10-27 01:54:44,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b550f101b/8a38f9e21dd1483fae6b37c3cf378524/FLAG929e58354 [2020-10-27 01:54:44,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b550f101b/8a38f9e21dd1483fae6b37c3cf378524 [2020-10-27 01:54:44,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:54:44,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:54:44,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:54:44,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:54:44,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:54:44,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290b80f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44, skipping insertion in model container [2020-10-27 01:54:44,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:54:44,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:54:44,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:54:44,844 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:54:44,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:54:44,916 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:54:44,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44 WrapperNode [2020-10-27 01:54:44,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:54:44,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:54:44,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:54:44,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:54:44,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (1/1) ... [2020-10-27 01:54:44,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:54:44,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:54:44,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:54:44,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:54:44,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (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 [2020-10-27 01:54:45,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:54:45,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:54:45,082 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:54:45,082 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:54:45,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:54:45,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:54:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:54:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:54:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:54:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:54:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:54:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:54:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:54:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:54:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:54:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:54:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:54:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:54:45,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:54:45,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:54:45,867 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:54:45,867 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 01:54:45,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:54:45 BoogieIcfgContainer [2020-10-27 01:54:45,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:54:45,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:54:45,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:54:45,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:54:45,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:54:44" (1/3) ... [2020-10-27 01:54:45,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c591541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:54:45, skipping insertion in model container [2020-10-27 01:54:45,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:44" (2/3) ... [2020-10-27 01:54:45,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c591541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:54:45, skipping insertion in model container [2020-10-27 01:54:45,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:54:45" (3/3) ... [2020-10-27 01:54:45,879 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2020-10-27 01:54:45,891 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:54:45,896 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:54:45,909 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:54:45,937 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:54:45,937 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:54:45,938 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:54:45,938 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:54:45,938 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:54:45,938 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:54:45,938 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:54:45,938 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:54:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-27 01:54:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:54:45,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:45,965 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] [2020-10-27 01:54:45,966 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1323235863, now seen corresponding path program 1 times [2020-10-27 01:54:45,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:45,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092271353] [2020-10-27 01:54:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:46,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:46,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:46,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:54:46,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:46,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-27 01:54:46,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:54:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:46,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:54:46,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:46,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:46,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:46,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:46,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 01:54:46,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:46,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:46,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:46,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092271353] [2020-10-27 01:54:46,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:54:46,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:54:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386654747] [2020-10-27 01:54:46,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:54:46,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:54:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:54:46,961 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-27 01:54:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:47,138 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-10-27 01:54:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:54:47,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-27 01:54:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:47,149 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:54:47,149 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:54:47,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:54:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:54:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:54:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:54:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-27 01:54:47,197 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2020-10-27 01:54:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:47,198 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-27 01:54:47,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:54:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-27 01:54:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:54:47,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:47,199 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] [2020-10-27 01:54:47,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:54:47,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash -120064893, now seen corresponding path program 1 times [2020-10-27 01:54:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:47,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353908704] [2020-10-27 01:54:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:47,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:47,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:47,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:47,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:54:47,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:47,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-27 01:54:47,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:54:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:54:47,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:47,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:47,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:47,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:47,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:47,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:54:47,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:54:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:47,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353908704] [2020-10-27 01:54:47,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:54:47,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:54:47,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348105358] [2020-10-27 01:54:47,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:54:47,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:47,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:54:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:54:47,968 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-27 01:54:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:48,225 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-10-27 01:54:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:54:48,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 01:54:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:48,229 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:54:48,229 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:54:48,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:54:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:54:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-10-27 01:54:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:54:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-27 01:54:48,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2020-10-27 01:54:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:48,244 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-27 01:54:48,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:54:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-27 01:54:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:54:48,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:48,246 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] [2020-10-27 01:54:48,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:54:48,246 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash -8333369, now seen corresponding path program 1 times [2020-10-27 01:54:48,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:48,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090918116] [2020-10-27 01:54:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:48,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:48,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:54:48,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:48,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-27 01:54:48,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:54:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:54:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:54:48,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:49,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:49,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:49,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:49,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:49,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:49,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:54:49,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:54:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:54:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:49,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090918116] [2020-10-27 01:54:49,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:49,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:54:49,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924062482] [2020-10-27 01:54:49,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:54:49,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:54:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:54:49,039 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 15 states. [2020-10-27 01:54:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:50,940 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2020-10-27 01:54:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:54:50,941 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-27 01:54:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:50,946 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:54:50,946 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:54:50,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=344, Invalid=1378, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:54:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:54:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2020-10-27 01:54:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:54:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-27 01:54:50,963 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 26 [2020-10-27 01:54:50,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:50,963 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-27 01:54:50,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:54:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-27 01:54:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:54:50,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:50,965 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] [2020-10-27 01:54:50,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:54:50,965 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1580014533, now seen corresponding path program 1 times [2020-10-27 01:54:50,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:50,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340743681] [2020-10-27 01:54:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:51,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:51,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:51,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:54:51,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-27 01:54:51,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:51,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:54:51,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:54:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:54:51,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:51,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:51,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:51,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:51,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:51,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:54:51,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:51,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:51,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 01:54:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:54:51,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340743681] [2020-10-27 01:54:51,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:51,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:54:51,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218402456] [2020-10-27 01:54:51,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:54:51,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:54:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:54:51,750 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 9 states. [2020-10-27 01:54:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:52,211 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-27 01:54:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:54:52,212 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:54:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:52,215 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:54:52,216 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:54:52,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:54:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:54:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 61. [2020-10-27 01:54:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:54:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-27 01:54:52,232 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 26 [2020-10-27 01:54:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:52,233 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-27 01:54:52,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:54:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-10-27 01:54:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:54:52,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:52,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:52,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:54:52,235 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:52,236 INFO L82 PathProgramCache]: Analyzing trace with hash 446340090, now seen corresponding path program 2 times [2020-10-27 01:54:52,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:52,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869090132] [2020-10-27 01:54:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:52,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:52,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:52,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:54:52,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-27 01:54:52,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:54:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:54:52,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:52,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:52,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:52,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:52,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:52,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:54:52,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:52,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:52,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:52,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:52,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:54:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:52,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869090132] [2020-10-27 01:54:52,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:52,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:54:52,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016300929] [2020-10-27 01:54:52,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:54:52,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:52,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:54:52,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:54:52,726 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 8 states. [2020-10-27 01:54:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:53,040 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2020-10-27 01:54:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:54:53,041 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 01:54:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:53,042 INFO L225 Difference]: With dead ends: 201 [2020-10-27 01:54:53,043 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:54:53,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:54:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:54:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2020-10-27 01:54:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:54:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-10-27 01:54:53,073 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 29 [2020-10-27 01:54:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:53,074 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-10-27 01:54:53,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:54:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-10-27 01:54:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:54:53,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:53,079 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] [2020-10-27 01:54:53,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:54:53,079 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1190099693, now seen corresponding path program 1 times [2020-10-27 01:54:53,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:53,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703863127] [2020-10-27 01:54:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:53,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:53,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:53,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:53,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:54:53,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-27 01:54:53,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:54:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:54:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:53,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:53,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:53,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:53,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:53,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:54:53,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:53,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:53,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:53,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:54:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:54:53,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703863127] [2020-10-27 01:54:53,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:54:53,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:54:53,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268845444] [2020-10-27 01:54:53,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:54:53,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:54:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:54:53,597 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 4 states. [2020-10-27 01:54:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:53,734 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2020-10-27 01:54:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:54:53,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 01:54:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:53,737 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:54:53,737 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:54:53,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:54:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:54:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-27 01:54:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:54:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-10-27 01:54:53,766 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 29 [2020-10-27 01:54:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:53,766 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-10-27 01:54:53,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:54:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-10-27 01:54:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:54:53,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:53,770 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] [2020-10-27 01:54:53,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:54:53,771 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash -372451243, now seen corresponding path program 1 times [2020-10-27 01:54:53,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:53,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560558291] [2020-10-27 01:54:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:55,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:55,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:54:55,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:55,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-27 01:54:55,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:55,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:54:55,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:55,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:54:55,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:54:55,333 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2020-10-27 01:54:55,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:55,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:55,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:55,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:54:55,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:55,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:55,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560558291] [2020-10-27 01:54:55,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:55,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:54:55,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363591139] [2020-10-27 01:54:55,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:54:55,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:55,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:54:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:54:55,573 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 12 states. [2020-10-27 01:54:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:56,665 INFO L93 Difference]: Finished difference Result 226 states and 288 transitions. [2020-10-27 01:54:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:54:56,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:54:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:56,671 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:54:56,671 INFO L226 Difference]: Without dead ends: 203 [2020-10-27 01:54:56,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:54:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-27 01:54:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 102. [2020-10-27 01:54:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:54:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2020-10-27 01:54:56,707 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 29 [2020-10-27 01:54:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:56,708 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2020-10-27 01:54:56,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:54:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2020-10-27 01:54:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:54:56,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:56,713 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:54:56,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:54:56,713 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash 461705669, now seen corresponding path program 2 times [2020-10-27 01:54:56,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:56,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806489795] [2020-10-27 01:54:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:56,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:56,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:58,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:59,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:59,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:54:59,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:54:59,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2646 [2020-10-27 01:54:59,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:59,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:54:59,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:54:59,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:54:59,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:59,454 ERROR L253 erpolLogProxyWrapper]: Interpolant 12 not inductive [2020-10-27 01:54:59,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:54:59,466 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 01:54:59,474 INFO L168 Benchmark]: Toolchain (without parser) took 14880.10 ms. Allocated memory was 161.5 MB in the beginning and 336.6 MB in the end (delta: 175.1 MB). Free memory was 136.6 MB in the beginning and 179.0 MB in the end (delta: -42.4 MB). Peak memory consumption was 163.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:54:59,475 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:54:59,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.65 ms. Allocated memory is still 161.5 MB. Free memory was 135.8 MB in the beginning and 124.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:54:59,481 INFO L168 Benchmark]: Boogie Preprocessor took 57.62 ms. Allocated memory is still 161.5 MB. Free memory was 124.5 MB in the beginning and 122.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:54:59,481 INFO L168 Benchmark]: RCFGBuilder took 892.51 ms. Allocated memory is still 161.5 MB. Free memory was 122.2 MB in the beginning and 99.6 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:54:59,482 INFO L168 Benchmark]: TraceAbstraction took 13598.93 ms. Allocated memory was 161.5 MB in the beginning and 336.6 MB in the end (delta: 175.1 MB). Free memory was 99.4 MB in the beginning and 179.0 MB in the end (delta: -79.6 MB). Peak memory consumption was 126.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:54:59,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 310.65 ms. Allocated memory is still 161.5 MB. Free memory was 135.8 MB in the beginning and 124.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.62 ms. Allocated memory is still 161.5 MB. Free memory was 124.5 MB in the beginning and 122.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 892.51 ms. Allocated memory is still 161.5 MB. Free memory was 122.2 MB in the beginning and 99.6 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13598.93 ms. Allocated memory was 161.5 MB in the beginning and 336.6 MB in the end (delta: 175.1 MB). Free memory was 99.4 MB in the beginning and 179.0 MB in the end (delta: -79.6 MB). Peak memory consumption was 126.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...