/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 SingleStatement --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:02:42,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:02:42,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:02:42,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:02:42,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:02:42,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:02:42,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:02:42,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:02:42,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:02:42,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:02:42,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:02:42,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:02:42,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:02:42,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:02:42,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:02:42,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:02:42,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:02:42,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:02:42,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:02:42,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:02:42,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:02:42,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:02:42,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:02:42,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:02:42,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:02:42,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:02:42,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:02:42,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:02:42,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:02:42,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:02:42,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:02:42,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:02:42,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:02:42,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:02:42,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:02:42,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:02:42,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:02:42,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:02:42,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:02:42,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:02:42,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:02:42,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 08:02:42,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:02:42,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:02:42,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:02:42,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:02:42,995 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:02:42,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:02:42,995 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:02:42,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:02:42,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:02:42,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:02:42,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:02:42,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:02:42,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:02:42,997 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:02:42,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:02:42,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:02:42,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:02:42,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:02:42,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:02:42,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:02:42,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:02:42,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:02:42,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:02:42,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:02:42,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:02:42,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:02:43,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:02:43,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:02:43,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:02:43,000 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 -> SingleStatement 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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:02:43,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:02:43,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:02:43,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:02:43,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:02:43,516 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:02:43,517 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 08:02:43,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa9ca7287/d2d3c8dd9ebd44acba226f9efcbcbc83/FLAG98b4ab215 [2020-09-25 08:02:44,159 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:02:44,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 08:02:44,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa9ca7287/d2d3c8dd9ebd44acba226f9efcbcbc83/FLAG98b4ab215 [2020-09-25 08:02:44,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa9ca7287/d2d3c8dd9ebd44acba226f9efcbcbc83 [2020-09-25 08:02:44,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:02:44,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:02:44,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:02:44,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:02:44,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:02:44,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406521a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44, skipping insertion in model container [2020-09-25 08:02:44,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:02:44,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:02:44,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:02:44,804 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:02:44,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:02:44,843 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:02:44,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44 WrapperNode [2020-09-25 08:02:44,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:02:44,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:02:44,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:02:44,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:02:44,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (1/1) ... [2020-09-25 08:02:44,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:02:44,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:02:44,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:02:44,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:02:44,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (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 [2020-09-25 08:02:45,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:02:45,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:02:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:02:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:02:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:02:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:02:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:02:45,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:02:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:02:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 08:02:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:02:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:02:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:02:45,269 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:02:45,270 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 08:02:45,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:02:45 BoogieIcfgContainer [2020-09-25 08:02:45,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:02:45,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:02:45,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:02:45,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:02:45,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:02:44" (1/3) ... [2020-09-25 08:02:45,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df943cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:02:45, skipping insertion in model container [2020-09-25 08:02:45,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:02:44" (2/3) ... [2020-09-25 08:02:45,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df943cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:02:45, skipping insertion in model container [2020-09-25 08:02:45,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:02:45" (3/3) ... [2020-09-25 08:02:45,305 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-25 08:02:45,332 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:02:45,342 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:02:45,364 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:02:45,398 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:02:45,400 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:02:45,401 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:02:45,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:02:45,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:02:45,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:02:45,401 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:02:45,401 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:02:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 08:02:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 08:02:45,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:45,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:45,445 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:45,453 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-25 08:02:45,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:45,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274573014] [2020-09-25 08:02:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:45,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:45,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:45,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:45,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 08:02:45,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:02:45,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-25 08:02:45,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:45,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 08:02:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:02:45,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:45,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:45,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:45,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:45,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:02:45,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:45,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:45,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:45,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274573014] [2020-09-25 08:02:45,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:02:45,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 08:02:45,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520384775] [2020-09-25 08:02:45,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 08:02:45,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:45,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 08:02:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 08:02:45,786 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 08:02:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:45,811 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 08:02:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 08:02:45,813 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 08:02:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:45,823 INFO L225 Difference]: With dead ends: 41 [2020-09-25 08:02:45,824 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 08:02:45,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 08:02:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 08:02:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 08:02:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 08:02:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 08:02:45,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-25 08:02:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:45,877 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 08:02:45,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 08:02:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 08:02:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 08:02:45,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:45,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:45,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:02:45,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:45,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-25 08:02:45,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:45,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911892010] [2020-09-25 08:02:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:45,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:45,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:45,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:46,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 08:02:46,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:02:46,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-25 08:02:46,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:46,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:46,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 08:02:46,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:02:46,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 08:02:46,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:02:46,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:46,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:46,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:46,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:46,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:02:46,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:46,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:46,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:46,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911892010] [2020-09-25 08:02:46,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:02:46,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:02:46,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526566254] [2020-09-25 08:02:46,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:02:46,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:46,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:02:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:02:46,180 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-09-25 08:02:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:46,264 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-25 08:02:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 08:02:46,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-25 08:02:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:46,266 INFO L225 Difference]: With dead ends: 38 [2020-09-25 08:02:46,266 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 08:02:46,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:02:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 08:02:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 08:02:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 08:02:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-25 08:02:46,275 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2020-09-25 08:02:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:46,276 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-25 08:02:46,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:02:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-25 08:02:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 08:02:46,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:46,277 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] [2020-09-25 08:02:46,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:02:46,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:46,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1780115143, now seen corresponding path program 1 times [2020-09-25 08:02:46,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:46,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855373490] [2020-09-25 08:02:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:46,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:46,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 08:02:46,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:02:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-09-25 08:02:46,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:46,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:46,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:02:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:02:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 08:02:46,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:46,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:46,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:46,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:47,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:47,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:47,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 08:02:47,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:47,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:47,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:47,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:47,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:02:47,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855373490] [2020-09-25 08:02:47,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:02:47,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:02:47,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429089342] [2020-09-25 08:02:47,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:02:47,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:02:47,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:02:47,017 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2020-09-25 08:02:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:47,072 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-25 08:02:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:02:47,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-25 08:02:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:47,074 INFO L225 Difference]: With dead ends: 48 [2020-09-25 08:02:47,074 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 08:02:47,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:02:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 08:02:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 08:02:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 08:02:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 08:02:47,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2020-09-25 08:02:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:47,081 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 08:02:47,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:02:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 08:02:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 08:02:47,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:47,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:47,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:02:47,083 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-25 08:02:47,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:47,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608509490] [2020-09-25 08:02:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:47,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 08:02:47,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:02:47,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-09-25 08:02:47,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:47,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:47,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:02:47,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:02:47,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 08:02:47,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:47,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:47,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:47,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:47,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:02:47,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:47,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:47,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:47,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608509490] [2020-09-25 08:02:47,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:02:47,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 08:02:47,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050559870] [2020-09-25 08:02:47,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 08:02:47,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 08:02:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:02:47,331 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-09-25 08:02:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:47,401 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-25 08:02:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 08:02:47,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-25 08:02:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:47,404 INFO L225 Difference]: With dead ends: 46 [2020-09-25 08:02:47,404 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 08:02:47,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:02:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 08:02:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 08:02:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 08:02:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 08:02:47,411 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2020-09-25 08:02:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:47,412 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 08:02:47,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 08:02:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 08:02:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 08:02:47,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:47,413 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:47,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:02:47,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1832306077, now seen corresponding path program 2 times [2020-09-25 08:02:47,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:47,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001617807] [2020-09-25 08:02:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:47,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:47,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:48,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 08:02:48,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:02:48,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-09-25 08:02:48,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:48,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:48,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:02:48,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 08:02:48,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 08:02:48,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:48,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:48,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:48,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:48,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:48,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:02:48,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:48,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 08:02:48,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001617807] [2020-09-25 08:02:48,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:02:48,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 08:02:48,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165001728] [2020-09-25 08:02:48,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 08:02:48,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 08:02:48,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:02:48,561 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 3 states. [2020-09-25 08:02:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:48,589 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-25 08:02:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 08:02:48,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 08:02:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:48,591 INFO L225 Difference]: With dead ends: 54 [2020-09-25 08:02:48,591 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 08:02:48,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:02:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 08:02:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-25 08:02:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 08:02:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-25 08:02:48,602 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-09-25 08:02:48,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:48,602 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-25 08:02:48,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 08:02:48,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-25 08:02:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 08:02:48,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:48,604 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:48,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:02:48,605 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:48,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 3 times [2020-09-25 08:02:48,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:48,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294962733] [2020-09-25 08:02:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:48,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:49,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 08:02:49,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:02:49,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-09-25 08:02:49,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:49,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:49,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:02:49,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:02:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 08:02:49,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:49,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:49,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:49,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:49,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:49,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:02:49,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:49,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:49,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:49,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:49,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:49,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:49,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294962733] [2020-09-25 08:02:49,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:02:49,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 08:02:49,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28455932] [2020-09-25 08:02:49,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 08:02:49,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:49,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 08:02:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:02:49,161 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2020-09-25 08:02:49,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:49,287 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-09-25 08:02:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 08:02:49,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 08:02:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:49,288 INFO L225 Difference]: With dead ends: 57 [2020-09-25 08:02:49,289 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 08:02:49,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:02:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 08:02:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 08:02:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 08:02:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-09-25 08:02:49,296 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 33 [2020-09-25 08:02:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:49,296 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-09-25 08:02:49,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 08:02:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-09-25 08:02:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 08:02:49,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:49,298 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:49,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:02:49,299 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 4 times [2020-09-25 08:02:49,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:49,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406574] [2020-09-25 08:02:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:49,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:49,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:50,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:50,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:50,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 08:02:50,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:02:50,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-09-25 08:02:50,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:50,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:50,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:02:50,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:02:50,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 08:02:50,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:50,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:50,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:50,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:50,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:50,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:02:50,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:50,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:50,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:50,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406574] [2020-09-25 08:02:50,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:02:50,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 08:02:50,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677433604] [2020-09-25 08:02:50,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 08:02:50,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:50,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 08:02:50,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:02:50,183 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 11 states. [2020-09-25 08:02:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:50,338 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-09-25 08:02:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 08:02:50,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-09-25 08:02:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:50,340 INFO L225 Difference]: With dead ends: 66 [2020-09-25 08:02:50,340 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 08:02:50,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:02:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 08:02:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-09-25 08:02:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 08:02:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-09-25 08:02:50,348 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 42 [2020-09-25 08:02:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:50,348 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-09-25 08:02:50,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 08:02:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-09-25 08:02:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 08:02:50,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:50,350 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:50,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:02:50,350 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:50,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 5 times [2020-09-25 08:02:50,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:50,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908557776] [2020-09-25 08:02:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:50,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:50,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:50,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:51,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:51,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:51,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:51,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:51,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:51,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 08:02:51,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:02:51,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-09-25 08:02:51,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:51,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 08:02:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:02:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 08:02:52,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:52,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:52,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:52,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:52,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:52,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:52,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:02:52,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:52,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:52,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:52,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908557776] [2020-09-25 08:02:52,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:02:52,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 08:02:52,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718036706] [2020-09-25 08:02:52,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 08:02:52,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:52,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 08:02:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-25 08:02:52,159 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 13 states. [2020-09-25 08:02:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:52,397 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-09-25 08:02:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:02:52,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-09-25 08:02:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:52,399 INFO L225 Difference]: With dead ends: 75 [2020-09-25 08:02:52,399 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 08:02:52,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-09-25 08:02:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 08:02:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-25 08:02:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 08:02:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-25 08:02:52,407 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 51 [2020-09-25 08:02:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:52,407 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-25 08:02:52,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 08:02:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-25 08:02:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 08:02:52,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:52,409 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:52,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:02:52,410 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 6 times [2020-09-25 08:02:52,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:52,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884369135] [2020-09-25 08:02:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:52,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:52,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:52,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:53,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:53,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:53,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:53,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:54,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:54,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:54,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:54,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 08:02:54,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 08:02:54,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1974 [2020-09-25 08:02:54,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:54,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:54,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 08:02:54,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:02:54,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 08:02:54,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:54,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:54,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:54,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:54,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:54,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:54,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:02:54,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:54,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:54,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:54,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:54,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:54,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884369135] [2020-09-25 08:02:54,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:02:54,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 08:02:54,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728500010] [2020-09-25 08:02:54,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 08:02:54,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 08:02:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 08:02:54,578 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 15 states. [2020-09-25 08:02:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:54,841 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-09-25 08:02:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 08:02:54,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-09-25 08:02:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:54,842 INFO L225 Difference]: With dead ends: 84 [2020-09-25 08:02:54,843 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 08:02:54,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-25 08:02:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 08:02:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-09-25 08:02:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 08:02:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-09-25 08:02:54,850 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 60 [2020-09-25 08:02:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:54,851 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-09-25 08:02:54,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 08:02:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-09-25 08:02:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 08:02:54,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:54,852 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:54,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 08:02:54,853 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:54,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 7 times [2020-09-25 08:02:54,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:54,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816695534] [2020-09-25 08:02:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:54,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:54,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:55,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:56,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:56,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:56,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:57,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:57,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:57,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:57,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:58,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:58,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 08:02:58,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 08:02:58,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3162 [2020-09-25 08:02:58,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:58,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 08:02:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:02:58,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 08:02:58,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:02:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:58,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:58,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:02:58,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:02:58,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:02:58,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:02:58,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:02:58,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:02:58,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:02:58,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:02:58,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:02:58,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:02:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:02:58,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816695534] [2020-09-25 08:02:58,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:02:58,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 08:02:58,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239222336] [2020-09-25 08:02:58,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 08:02:58,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:02:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 08:02:58,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-25 08:02:58,242 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 17 states. [2020-09-25 08:02:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:02:58,574 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-09-25 08:02:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 08:02:58,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-09-25 08:02:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:02:58,575 INFO L225 Difference]: With dead ends: 93 [2020-09-25 08:02:58,575 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 08:02:58,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-25 08:02:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 08:02:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-25 08:02:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-25 08:02:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-09-25 08:02:58,591 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 69 [2020-09-25 08:02:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:02:58,592 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-09-25 08:02:58,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 08:02:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-09-25 08:02:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-25 08:02:58,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:02:58,596 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:02:58,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 08:02:58,598 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:02:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:02:58,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 8 times [2020-09-25 08:02:58,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:02:58,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054811575] [2020-09-25 08:02:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:02:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:02:58,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:58,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:58,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:02:59,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:00,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:00,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:01,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:01,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:02,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:02,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:02,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:03:02,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 08:03:02,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 08:03:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4086 [2020-09-25 08:03:02,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:03:02,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:03:02,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 08:03:02,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:03:02,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-25 08:03:02,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:03:03,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:03:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:03:03,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:03,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:03:03,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:03:03,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:03:03,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:03:03,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:03:03,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:03:03,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:03:03,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:03:03,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:03:03,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:03:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:03:03,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054811575] [2020-09-25 08:03:03,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:03:03,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 08:03:03,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363549645] [2020-09-25 08:03:03,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 08:03:03,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:03:03,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 08:03:03,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-25 08:03:03,163 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2020-09-25 08:03:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:03:03,628 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-09-25 08:03:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 08:03:03,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-09-25 08:03:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:03:03,630 INFO L225 Difference]: With dead ends: 115 [2020-09-25 08:03:03,630 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 08:03:03,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2020-09-25 08:03:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 08:03:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2020-09-25 08:03:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 08:03:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-09-25 08:03:03,646 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 78 [2020-09-25 08:03:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:03:03,647 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-09-25 08:03:03,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 08:03:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-09-25 08:03:03,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-25 08:03:03,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:03:03,648 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:03:03,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 08:03:03,649 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:03:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:03:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-09-25 08:03:03,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:03:03,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698285069] [2020-09-25 08:03:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:03:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:03:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:06,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:06,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:07,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:07,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:08,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:08,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:08,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:03:08,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-25 08:03:08,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 08:03:08,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 08:03:08,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:03:08,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:03:08,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 08:03:08,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:03:08,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-09-25 08:03:08,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:03:08,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:03:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:03:08,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:08,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:03:08,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:03:08,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:03:08,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:03:08,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:03:08,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:03:08,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:03:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:03:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:03:08,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:03:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:03:08,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698285069] [2020-09-25 08:03:08,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:03:08,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 08:03:08,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362884736] [2020-09-25 08:03:08,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 08:03:08,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:03:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 08:03:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-25 08:03:08,818 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 13 states. [2020-09-25 08:03:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:03:09,019 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-09-25 08:03:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 08:03:09,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-09-25 08:03:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:03:09,024 INFO L225 Difference]: With dead ends: 124 [2020-09-25 08:03:09,024 INFO L226 Difference]: Without dead ends: 116 [2020-09-25 08:03:09,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-09-25 08:03:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-25 08:03:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2020-09-25 08:03:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-25 08:03:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-09-25 08:03:09,049 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 96 [2020-09-25 08:03:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:03:09,049 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-09-25 08:03:09,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 08:03:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-09-25 08:03:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-25 08:03:09,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:03:09,054 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:03:09,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 08:03:09,055 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:03:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:03:09,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 1 times [2020-09-25 08:03:09,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:03:09,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137726381] [2020-09-25 08:03:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:03:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:03:09,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:09,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:03:09,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-25 08:03:09,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:03:09,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-09-25 08:03:09,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:03:09,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:03:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 08:03:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:03:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-25 08:03:09,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:03:10,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:03:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:03:10,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:03:10,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:03:10,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:03:10,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:03:10,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:03:10,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:03:10,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:03:10,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:03:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:03:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:03:10,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:03:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:03:10,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137726381] [2020-09-25 08:03:10,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:03:10,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 08:03:10,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57863258] [2020-09-25 08:03:10,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 08:03:10,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:03:10,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 08:03:10,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-09-25 08:03:10,158 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 23 states. [2020-09-25 08:03:11,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:03:11,223 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2020-09-25 08:03:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 08:03:11,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-09-25 08:03:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:03:11,224 INFO L225 Difference]: With dead ends: 106 [2020-09-25 08:03:11,224 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 08:03:11,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=1254, Unknown=0, NotChecked=0, Total=1640 [2020-09-25 08:03:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 08:03:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 08:03:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 08:03:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 08:03:11,228 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2020-09-25 08:03:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:03:11,231 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 08:03:11,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 08:03:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 08:03:11,231 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 08:03:11,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 08:03:11,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 08:03:11,574 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2020-09-25 08:03:11,578 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 08:03:11,579 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 08:03:11,579 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 08:03:11,579 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 08:03:11,579 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 08:03:11,579 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 08:03:11,579 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 08:03:11,579 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 08:03:11,580 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 08:03:11,580 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 08:03:11,580 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 08:03:11,580 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-25 08:03:11,580 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 08:03:11,580 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 08:03:11,580 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-25 08:03:11,581 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-25 08:03:11,581 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 08:03:11,581 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 08:03:11,581 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 08:03:11,581 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 08:03:11,581 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-25 08:03:11,581 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-25 08:03:11,582 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-25 08:03:11,582 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-25 08:03:11,582 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-25 08:03:11,582 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-25 08:03:11,582 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse4 (* 3 main_~y~0)) (.cse3 (+ main_~x~0 2)) (.cse2 (<= main_~y~0 main_~x~0)) (.cse5 (+ main_~x~0 main_~y~0)) (.cse0 (* 3 main_~x~0)) (.cse1 (<= 0 main_~y~0))) (or (and (<= 87 .cse0) .cse1 .cse2) (and (<= main_~y~0 4) (<= .cse3 .cse4) (<= 11 .cse5)) (and .cse1 (<= main_~y~0 7) (<= 87 (+ .cse0 .cse4))) (and (<= main_~x~0 main_~y~0) (<= main_~y~0 2) (<= 4 .cse5)) (let ((.cse6 (* 2 main_~y~0))) (and (<= main_~y~0 3) (<= .cse3 .cse6) (<= 10 (+ main_~x~0 .cse6)))) (and (<= main_~y~0 6) (<= 84 (+ .cse0 (* 6 main_~y~0))) .cse1) (and (<= main_~x~0 1) .cse2 (<= 1 .cse5)) (and (<= 78 (+ .cse0 (* 9 main_~y~0))) (<= main_~y~0 5) .cse1))) [2020-09-25 08:03:11,583 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-25 08:03:11,583 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 08:03:11,583 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 08:03:11,583 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 08:03:11,583 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 08:03:11,583 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 08:03:11,584 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 08:03:11,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:03:11 BoogieIcfgContainer [2020-09-25 08:03:11,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:03:11,619 INFO L168 Benchmark]: Toolchain (without parser) took 27089.85 ms. Allocated memory was 139.5 MB in the beginning and 387.4 MB in the end (delta: 248.0 MB). Free memory was 103.3 MB in the beginning and 296.2 MB in the end (delta: -192.9 MB). Peak memory consumption was 55.1 MB. Max. memory is 7.1 GB. [2020-09-25 08:03:11,620 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 08:03:11,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.29 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 08:03:11,625 INFO L168 Benchmark]: Boogie Preprocessor took 116.84 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 93.3 MB in the beginning and 179.9 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:03:11,625 INFO L168 Benchmark]: RCFGBuilder took 325.11 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 166.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-25 08:03:11,626 INFO L168 Benchmark]: TraceAbstraction took 26326.61 ms. Allocated memory was 200.8 MB in the beginning and 387.4 MB in the end (delta: 186.6 MB). Free memory was 165.5 MB in the beginning and 296.2 MB in the end (delta: -130.7 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-09-25 08:03:11,629 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.29 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.84 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 93.3 MB in the beginning and 179.9 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.11 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 166.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26326.61 ms. Allocated memory was 200.8 MB in the beginning and 387.4 MB in the end (delta: 186.6 MB). Free memory was 165.5 MB in the beginning and 296.2 MB in the end (delta: -130.7 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((((((((87 <= 3 * x && 0 <= y) && y <= x) || ((y <= 4 && x + 2 <= 3 * y) && 11 <= x + y)) || ((0 <= y && y <= 7) && 87 <= 3 * x + 3 * y)) || ((x <= y && y <= 2) && 4 <= x + y)) || ((y <= 3 && x + 2 <= 2 * y) && 10 <= x + 2 * y)) || ((y <= 6 && 84 <= 3 * x + 6 * y) && 0 <= y)) || ((x <= 1 && y <= x) && 1 <= x + y)) || ((78 <= 3 * x + 9 * y && y <= 5) && 0 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.8s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 446 SDtfs, 700 SDslu, 2970 SDs, 0 SdLazy, 1245 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 39 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 20 PreInvPairs, 39 NumberOfFragments, 127 HoareAnnotationTreeSize, 20 FomulaSimplifications, 60 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 295 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 21.9s InterpolantComputationTime, 630 NumberOfCodeBlocks, 630 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 617 ConstructedInterpolants, 0 QuantifiedInterpolants, 217452 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 16/1324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...