/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:21:58,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:21:58,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:21:58,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:21:58,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:21:58,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:21:58,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:21:58,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:21:58,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:21:59,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:21:59,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:21:59,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:21:59,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:21:59,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:21:59,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:21:59,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:21:59,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:21:59,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:21:59,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:21:59,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:21:59,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:21:59,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:21:59,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:21:59,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:21:59,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:21:59,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:21:59,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:21:59,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:21:59,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:21:59,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:21:59,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:21:59,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:21:59,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:21:59,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:21:59,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:21:59,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:21:59,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:21:59,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:21:59,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:21:59,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:21:59,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:21:59,061 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 12:21:59,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:21:59,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:21:59,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:21:59,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:21:59,100 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:21:59,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:21:59,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:21:59,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:21:59,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:21:59,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:21:59,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:21:59,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:21:59,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:21:59,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:21:59,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:21:59,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:21:59,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:21:59,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:21:59,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:21:59,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:21:59,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:21:59,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:21:59,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:21:59,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:21:59,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:21:59,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:21:59,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:21:59,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:21:59,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:21:59,106 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:21:59,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:21:59,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:21:59,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:21:59,592 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:21:59,592 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:21:59,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2020-09-25 12:21:59,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6d91411a/cd5e557b8441416bac62a2acde0f12c8/FLAG84206cfd5 [2020-09-25 12:22:00,328 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:22:00,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2020-09-25 12:22:00,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6d91411a/cd5e557b8441416bac62a2acde0f12c8/FLAG84206cfd5 [2020-09-25 12:22:00,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6d91411a/cd5e557b8441416bac62a2acde0f12c8 [2020-09-25 12:22:00,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:22:00,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:22:00,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:22:00,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:22:00,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:22:00,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:22:00" (1/1) ... [2020-09-25 12:22:00,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f78b0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:00, skipping insertion in model container [2020-09-25 12:22:00,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:22:00" (1/1) ... [2020-09-25 12:22:00,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:22:00,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:22:01,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:22:01,089 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:22:01,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:22:01,243 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:22:01,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01 WrapperNode [2020-09-25 12:22:01,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:22:01,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:22:01,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:22:01,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:22:01,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (1/1) ... [2020-09-25 12:22:01,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (1/1) ... [2020-09-25 12:22:01,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (1/1) ... [2020-09-25 12:22:01,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (1/1) ... [2020-09-25 12:22:01,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (1/1) ... [2020-09-25 12:22:01,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (1/1) ... [2020-09-25 12:22:01,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (1/1) ... [2020-09-25 12:22:01,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:22:01,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:22:01,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:22:01,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:22:01,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (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 12:22:01,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:22:01,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:22:01,553 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 12:22:01,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:22:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 12:22:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:22:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:22:01,554 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:22:01,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:22:01,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:22:01,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:22:02,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:22:02,887 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:22:02,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:22:02 BoogieIcfgContainer [2020-09-25 12:22:02,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:22:02,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:22:02,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:22:02,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:22:02,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:22:00" (1/3) ... [2020-09-25 12:22:02,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6b3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:22:02, skipping insertion in model container [2020-09-25 12:22:02,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:01" (2/3) ... [2020-09-25 12:22:02,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6b3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:22:02, skipping insertion in model container [2020-09-25 12:22:02,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:22:02" (3/3) ... [2020-09-25 12:22:02,907 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label41.c [2020-09-25 12:22:02,918 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:22:02,938 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:22:02,960 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:22:03,006 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:22:03,007 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:22:03,007 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:22:03,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:22:03,007 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:22:03,007 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:22:03,008 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:22:03,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:22:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 12:22:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-25 12:22:03,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:03,070 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] [2020-09-25 12:22:03,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -672460611, now seen corresponding path program 1 times [2020-09-25 12:22:03,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:03,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424349087] [2020-09-25 12:22:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:03,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:03,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:04,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:07,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:08,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:08,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-09-25 12:22:08,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:22:08,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 12:22:08,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:08,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:08,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:22:08,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 12:22:08,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-25 12:22:08,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:22:08,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:08,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:08,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:08,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:08,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:08,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 12:22:08,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:08,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:08,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 12:22:08,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:08,626 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 12:22:08,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424349087] [2020-09-25 12:22:08,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:22:08,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:22:08,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922887654] [2020-09-25 12:22:08,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:22:08,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:22:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:22:08,658 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 12:22:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:10,712 INFO L93 Difference]: Finished difference Result 1235 states and 1633 transitions. [2020-09-25 12:22:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:22:10,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-09-25 12:22:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:10,749 INFO L225 Difference]: With dead ends: 1235 [2020-09-25 12:22:10,750 INFO L226 Difference]: Without dead ends: 661 [2020-09-25 12:22:10,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:22:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-09-25 12:22:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 605. [2020-09-25 12:22:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-09-25 12:22:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 715 transitions. [2020-09-25 12:22:10,871 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 715 transitions. Word has length 113 [2020-09-25 12:22:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:10,872 INFO L479 AbstractCegarLoop]: Abstraction has 605 states and 715 transitions. [2020-09-25 12:22:10,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:22:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 715 transitions. [2020-09-25 12:22:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-25 12:22:10,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:10,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:10,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:22:10,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1544605760, now seen corresponding path program 1 times [2020-09-25 12:22:10,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:10,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532044230] [2020-09-25 12:22:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:10,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:11,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:13,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:14,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:15,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:15,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:15,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-25 12:22:15,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 12:22:15,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 12:22:15,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:15,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:22:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 12:22:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-09-25 12:22:15,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:16,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:16,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:16,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:16,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:16,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:16,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 12:22:16,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:16,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:16,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:22:16,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:16,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:22:16,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:16,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:22:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:16,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:16,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:22:16,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:16,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:22:16,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:16,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 12:22:16,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:16,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532044230] [2020-09-25 12:22:16,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:22:16,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:22:16,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904059129] [2020-09-25 12:22:16,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:22:16,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:22:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:22:16,181 INFO L87 Difference]: Start difference. First operand 605 states and 715 transitions. Second operand 5 states. [2020-09-25 12:22:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:18,150 INFO L93 Difference]: Finished difference Result 1524 states and 1875 transitions. [2020-09-25 12:22:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:22:18,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-09-25 12:22:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:18,165 INFO L225 Difference]: With dead ends: 1524 [2020-09-25 12:22:18,166 INFO L226 Difference]: Without dead ends: 943 [2020-09-25 12:22:18,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:22:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2020-09-25 12:22:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 891. [2020-09-25 12:22:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2020-09-25 12:22:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1072 transitions. [2020-09-25 12:22:18,221 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1072 transitions. Word has length 130 [2020-09-25 12:22:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:18,222 INFO L479 AbstractCegarLoop]: Abstraction has 891 states and 1072 transitions. [2020-09-25 12:22:18,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:22:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1072 transitions. [2020-09-25 12:22:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 12:22:18,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:18,228 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:18,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:22:18,229 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1859994479, now seen corresponding path program 1 times [2020-09-25 12:22:18,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:18,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522820759] [2020-09-25 12:22:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:18,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:18,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:18,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:19,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:20,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:20,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:23,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:23,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:23,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-09-25 12:22:23,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 12:22:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-09-25 12:22:23,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:23,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 12:22:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 12:22:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 12:22:23,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:23,851 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-09-25 12:22:24,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:24,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:24,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:24,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:24,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 12:22:24,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:24,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 12:22:24,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:24,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:22:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:24,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:24,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:24,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:24,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 12:22:24,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:22:24,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-09-25 12:22:24,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:24,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:22:24,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:24,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 12:22:24,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:24,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522820759] [2020-09-25 12:22:24,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:22:24,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 12:22:24,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139218285] [2020-09-25 12:22:24,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 12:22:24,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:24,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 12:22:24,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:22:24,696 INFO L87 Difference]: Start difference. First operand 891 states and 1072 transitions. Second operand 19 states. [2020-09-25 12:22:25,517 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-25 12:22:25,914 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-09-25 12:22:26,305 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-09-25 12:22:26,623 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-09-25 12:22:27,675 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-09-25 12:22:28,909 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2020-09-25 12:22:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:31,199 INFO L93 Difference]: Finished difference Result 2208 states and 2810 transitions. [2020-09-25 12:22:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 12:22:31,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 135 [2020-09-25 12:22:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:31,211 INFO L225 Difference]: With dead ends: 2208 [2020-09-25 12:22:31,212 INFO L226 Difference]: Without dead ends: 1341 [2020-09-25 12:22:31,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2020-09-25 12:22:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-09-25 12:22:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1256. [2020-09-25 12:22:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1256 states. [2020-09-25 12:22:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1430 transitions. [2020-09-25 12:22:31,288 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1430 transitions. Word has length 135 [2020-09-25 12:22:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:31,290 INFO L479 AbstractCegarLoop]: Abstraction has 1256 states and 1430 transitions. [2020-09-25 12:22:31,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 12:22:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1430 transitions. [2020-09-25 12:22:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-25 12:22:31,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:31,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:31,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:22:31,298 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1515420428, now seen corresponding path program 1 times [2020-09-25 12:22:31,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:31,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101454677] [2020-09-25 12:22:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:31,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:31,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:31,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:36,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:36,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-09-25 12:22:36,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:22:36,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 12:22:36,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:36,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:36,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 12:22:36,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 12:22:36,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-09-25 12:22:36,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:37,121 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-09-25 12:22:37,383 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2020-09-25 12:22:37,633 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2020-09-25 12:22:37,835 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 46 [2020-09-25 12:22:38,042 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 42 [2020-09-25 12:22:38,245 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 36 [2020-09-25 12:22:38,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:38,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:38,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:38,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:38,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:38,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 12:22:38,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:38,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:38,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:22:38,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 12:22:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:38,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:22:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:38,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:38,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:38,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:38,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 12:22:38,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:22:38,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-09-25 12:22:38,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:38,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:38,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:22:38,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 12:22:38,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 12:22:38,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:38,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101454677] [2020-09-25 12:22:38,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:22:38,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 12:22:38,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155046126] [2020-09-25 12:22:38,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 12:22:38,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 12:22:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:22:38,915 INFO L87 Difference]: Start difference. First operand 1256 states and 1430 transitions. Second operand 17 states. [2020-09-25 12:22:41,942 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-09-25 12:22:42,226 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-09-25 12:22:43,035 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-09-25 12:22:43,274 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-09-25 12:22:43,474 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 12:22:44,218 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-09-25 12:22:44,369 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-25 12:22:44,851 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-09-25 12:22:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:45,926 INFO L93 Difference]: Finished difference Result 4143 states and 4897 transitions. [2020-09-25 12:22:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 12:22:45,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 150 [2020-09-25 12:22:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:45,949 INFO L225 Difference]: With dead ends: 4143 [2020-09-25 12:22:45,950 INFO L226 Difference]: Without dead ends: 2911 [2020-09-25 12:22:45,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 12:22:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2020-09-25 12:22:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2357. [2020-09-25 12:22:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2020-09-25 12:22:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 2708 transitions. [2020-09-25 12:22:46,050 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 2708 transitions. Word has length 150 [2020-09-25 12:22:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:46,050 INFO L479 AbstractCegarLoop]: Abstraction has 2357 states and 2708 transitions. [2020-09-25 12:22:46,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 12:22:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 2708 transitions. [2020-09-25 12:22:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-25 12:22:46,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:46,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:46,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:22:46,059 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:46,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1140849621, now seen corresponding path program 1 times [2020-09-25 12:22:46,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:46,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327960528] [2020-09-25 12:22:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:46,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:47,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:48,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:49,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking...