/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=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:13:40,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:13:40,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:13:41,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:13:41,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:13:41,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:13:41,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:13:41,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:13:41,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:13:41,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:13:41,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:13:41,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:13:41,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:13:41,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:13:41,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:13:41,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:13:41,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:13:41,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:13:41,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:13:41,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:13:41,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:13:41,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:13:41,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:13:41,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:13:41,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:13:41,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:13:41,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:13:41,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:13:41,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:13:41,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:13:41,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:13:41,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:13:41,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:13:41,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:13:41,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:13:41,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:13:41,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:13:41,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:13:41,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:13:41,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:13:41,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:13:41,077 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 09:13:41,127 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:13:41,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:13:41,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:13:41,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:13:41,131 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:13:41,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:13:41,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:13:41,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:13:41,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:13:41,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:13:41,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:13:41,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:13:41,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:13:41,134 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:13:41,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:13:41,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:13:41,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:13:41,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:13:41,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:13:41,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:13:41,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:13:41,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:13:41,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:13:41,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:13:41,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:13:41,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:13:41,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:13:41,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:13:41,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:13:41,138 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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-09-25 09:13:41,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:13:41,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:13:41,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:13:41,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:13:41,628 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:13:41,630 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 09:13:41,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18b4b66b5/91a1dbda85944fa4824ed7b805a54de6/FLAGf3f480357 [2020-09-25 09:13:42,382 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:13:42,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 09:13:42,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18b4b66b5/91a1dbda85944fa4824ed7b805a54de6/FLAGf3f480357 [2020-09-25 09:13:42,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18b4b66b5/91a1dbda85944fa4824ed7b805a54de6 [2020-09-25 09:13:42,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:13:42,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:13:42,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:42,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:13:42,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:13:42,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:42" (1/1) ... [2020-09-25 09:13:42,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658c4011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:42, skipping insertion in model container [2020-09-25 09:13:42,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:42" (1/1) ... [2020-09-25 09:13:42,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:13:42,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:13:43,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:43,394 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:13:43,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:43,842 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:13:43,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43 WrapperNode [2020-09-25 09:13:43,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:43,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:13:43,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:13:43,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:13:43,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (1/1) ... [2020-09-25 09:13:43,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (1/1) ... [2020-09-25 09:13:43,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (1/1) ... [2020-09-25 09:13:43,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (1/1) ... [2020-09-25 09:13:43,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (1/1) ... [2020-09-25 09:13:43,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (1/1) ... [2020-09-25 09:13:43,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (1/1) ... [2020-09-25 09:13:43,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:13:43,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:13:43,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:13:43,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:13:43,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (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 09:13:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:13:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:13:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:13:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:13:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:13:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 09:13:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 09:13:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 09:13:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:13:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:13:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 09:13:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 09:13:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 09:13:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 09:13:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 09:13:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 09:13:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 09:13:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:13:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:13:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:13:45,948 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:13:45,949 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:13:45,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:45 BoogieIcfgContainer [2020-09-25 09:13:45,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:13:45,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:13:45,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:13:45,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:13:45,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:13:42" (1/3) ... [2020-09-25 09:13:45,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54620da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:45, skipping insertion in model container [2020-09-25 09:13:45,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:43" (2/3) ... [2020-09-25 09:13:45,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54620da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:45, skipping insertion in model container [2020-09-25 09:13:45,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:45" (3/3) ... [2020-09-25 09:13:45,987 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 09:13:46,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:13:46,025 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:13:46,049 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:13:46,095 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:13:46,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:13:46,095 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:13:46,095 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:13:46,096 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:13:46,096 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:13:46,096 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:13:46,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:13:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-25 09:13:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 09:13:46,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:46,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:13:46,213 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-25 09:13:46,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:46,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531143419] [2020-09-25 09:13:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:47,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:47,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:48,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:48,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:49,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:51,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:51,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 09:13:51,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:13:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-09-25 09:13:51,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:51,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:13:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-09-25 09:13:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 09:13:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:13:52,627 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 09:13:52,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:52,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:52,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:52,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 09:13:52,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:52,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 09:13:52,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:52,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:53,031 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 09:13:53,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531143419] [2020-09-25 09:13:53,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:53,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:13:53,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56097389] [2020-09-25 09:13:53,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:13:53,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:53,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:13:53,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:13:53,076 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 4 states. [2020-09-25 09:13:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:56,906 INFO L93 Difference]: Finished difference Result 1664 states and 2163 transitions. [2020-09-25 09:13:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:13:56,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 09:13:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:56,954 INFO L225 Difference]: With dead ends: 1664 [2020-09-25 09:13:56,955 INFO L226 Difference]: Without dead ends: 1251 [2020-09-25 09:13:56,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:13:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-09-25 09:13:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1244. [2020-09-25 09:13:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-25 09:13:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1517 transitions. [2020-09-25 09:13:57,121 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1517 transitions. Word has length 460 [2020-09-25 09:13:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:57,126 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1517 transitions. [2020-09-25 09:13:57,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:13:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1517 transitions. [2020-09-25 09:13:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 09:13:57,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:57,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:13:57,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:13:57,139 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:57,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1495383786, now seen corresponding path program 1 times [2020-09-25 09:13:57,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:57,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189468849] [2020-09-25 09:13:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:57,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:57,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:58,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:58,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:58,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:02,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:02,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 09:14:02,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:14:02,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-09-25 09:14:02,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:02,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:14:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-09-25 09:14:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-09-25 09:14:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:02,781 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 09:14:02,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:02,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:02,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:02,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 09:14:02,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:02,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 09:14:02,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:02,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:02,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:03,117 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 09:14:03,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189468849] [2020-09-25 09:14:03,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:03,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:14:03,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70354449] [2020-09-25 09:14:03,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:14:03,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:14:03,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:14:03,124 INFO L87 Difference]: Start difference. First operand 1244 states and 1517 transitions. Second operand 4 states. [2020-09-25 09:14:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:05,986 INFO L93 Difference]: Finished difference Result 2510 states and 3146 transitions. [2020-09-25 09:14:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:14:05,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 09:14:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:06,005 INFO L225 Difference]: With dead ends: 2510 [2020-09-25 09:14:06,005 INFO L226 Difference]: Without dead ends: 2066 [2020-09-25 09:14:06,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:14:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-09-25 09:14:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2054. [2020-09-25 09:14:06,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-09-25 09:14:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2545 transitions. [2020-09-25 09:14:06,098 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2545 transitions. Word has length 460 [2020-09-25 09:14:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:06,100 INFO L479 AbstractCegarLoop]: Abstraction has 2054 states and 2545 transitions. [2020-09-25 09:14:06,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:14:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2545 transitions. [2020-09-25 09:14:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 09:14:06,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:06,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:14:06,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:14:06,117 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -863833942, now seen corresponding path program 1 times [2020-09-25 09:14:06,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:06,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47493816] [2020-09-25 09:14:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:14:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:06,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:07,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:07,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:11,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:11,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 09:14:11,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:14:11,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-25 09:14:11,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:11,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:11,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:14:11,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 09:14:11,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-25 09:14:11,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:11,748 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 09:14:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:11,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:11,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 09:14:11,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:11,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 09:14:11,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:11,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:11,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:11,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:11,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:11,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:11,996 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 09:14:11,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47493816] [2020-09-25 09:14:11,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:11,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:14:11,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256199559] [2020-09-25 09:14:11,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:14:11,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:11,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:14:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:14:11,999 INFO L87 Difference]: Start difference. First operand 2054 states and 2545 transitions. Second operand 4 states. [2020-09-25 09:14:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:14,816 INFO L93 Difference]: Finished difference Result 4382 states and 5559 transitions. [2020-09-25 09:14:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:14:14,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 09:14:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:14,835 INFO L225 Difference]: With dead ends: 4382 [2020-09-25 09:14:14,835 INFO L226 Difference]: Without dead ends: 3596 [2020-09-25 09:14:14,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:14:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-09-25 09:14:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3574. [2020-09-25 09:14:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-09-25 09:14:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4481 transitions. [2020-09-25 09:14:14,942 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4481 transitions. Word has length 460 [2020-09-25 09:14:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:14,943 INFO L479 AbstractCegarLoop]: Abstraction has 3574 states and 4481 transitions. [2020-09-25 09:14:14,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:14:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4481 transitions. [2020-09-25 09:14:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 09:14:14,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:14,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:14:14,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:14:14,963 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1795052938, now seen corresponding path program 1 times [2020-09-25 09:14:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:14,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73438698] [2020-09-25 09:14:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:14:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:15,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:15,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:15,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:16,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:18,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:18,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:19,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:20,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:20,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 09:14:20,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:14:20,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 09:14:20,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:20,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:20,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:14:20,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-25 09:14:20,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 09:14:20,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:20,598 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 09:14:20,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:20,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:20,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:20,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 09:14:20,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:20,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 09:14:20,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:20,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:20,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:20,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:20,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:20,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:14:20,908 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 09:14:20,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73438698] [2020-09-25 09:14:20,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:20,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:14:20,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372549333] [2020-09-25 09:14:20,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:14:20,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:14:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:14:20,911 INFO L87 Difference]: Start difference. First operand 3574 states and 4481 transitions. Second operand 5 states. [2020-09-25 09:14:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:26,076 INFO L93 Difference]: Finished difference Result 10121 states and 12748 transitions. [2020-09-25 09:14:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:14:26,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-25 09:14:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:26,108 INFO L225 Difference]: With dead ends: 10121 [2020-09-25 09:14:26,108 INFO L226 Difference]: Without dead ends: 6748 [2020-09-25 09:14:26,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:14:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2020-09-25 09:14:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6746. [2020-09-25 09:14:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6746 states. [2020-09-25 09:14:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 8441 transitions. [2020-09-25 09:14:26,369 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 8441 transitions. Word has length 460 [2020-09-25 09:14:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:26,369 INFO L479 AbstractCegarLoop]: Abstraction has 6746 states and 8441 transitions. [2020-09-25 09:14:26,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:14:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 8441 transitions. [2020-09-25 09:14:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-25 09:14:26,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:26,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:14:26,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:14:26,386 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:26,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1978917356, now seen corresponding path program 1 times [2020-09-25 09:14:26,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:26,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411102640] [2020-09-25 09:14:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:14:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:26,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:26,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:26,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:26,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:27,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:27,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking...