/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:51:37,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:51:37,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:51:37,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:51:37,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:51:37,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:51:37,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:51:37,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:51:37,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:51:37,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:51:37,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:51:37,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:51:37,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:51:37,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:51:37,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:51:37,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:51:37,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:51:37,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:51:37,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:51:37,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:51:37,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:51:37,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:51:37,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:51:37,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:51:37,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:51:37,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:51:37,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:51:37,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:51:37,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:51:37,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:51:37,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:51:37,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:51:37,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:51:37,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:51:37,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:51:37,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:51:37,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:51:37,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:51:37,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:51:37,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:51:37,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:51:37,985 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 07:51:38,037 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:51:38,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:51:38,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:51:38,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:51:38,040 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:51:38,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:51:38,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:51:38,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:51:38,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:51:38,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:51:38,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:51:38,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:51:38,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:51:38,043 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:51:38,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:51:38,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:51:38,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:51:38,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:51:38,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:51:38,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:51:38,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:51:38,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:51:38,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:51:38,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:51:38,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:51:38,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:51:38,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:51:38,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:51:38,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:51:38,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:51:38,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:51:38,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:51:38,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:51:38,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:51:38,564 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:51:38,565 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-25 07:51:38,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0aaa30a2d/79fb80b6ff644a8e948c7dbb884a870d/FLAG9e44d021a [2020-09-25 07:51:39,347 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:51:39,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-25 07:51:39,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0aaa30a2d/79fb80b6ff644a8e948c7dbb884a870d/FLAG9e44d021a [2020-09-25 07:51:39,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0aaa30a2d/79fb80b6ff644a8e948c7dbb884a870d [2020-09-25 07:51:39,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:51:39,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:51:39,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:51:39,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:51:39,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:51:39,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:51:39" (1/1) ... [2020-09-25 07:51:39,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245d8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:39, skipping insertion in model container [2020-09-25 07:51:39,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:51:39" (1/1) ... [2020-09-25 07:51:39,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:51:39,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:51:40,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:51:40,173 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:51:40,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:51:40,475 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:51:40,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40 WrapperNode [2020-09-25 07:51:40,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:51:40,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:51:40,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:51:40,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:51:40,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (1/1) ... [2020-09-25 07:51:40,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (1/1) ... [2020-09-25 07:51:40,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (1/1) ... [2020-09-25 07:51:40,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (1/1) ... [2020-09-25 07:51:40,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (1/1) ... [2020-09-25 07:51:40,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (1/1) ... [2020-09-25 07:51:40,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (1/1) ... [2020-09-25 07:51:40,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:51:40,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:51:40,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:51:40,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:51:40,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (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 07:51:40,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:51:40,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:51:40,735 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 07:51:40,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:51:40,736 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 07:51:40,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:51:40,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:51:40,738 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 07:51:40,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:51:40,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:51:40,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:51:42,360 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:51:42,360 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 07:51:42,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:51:42 BoogieIcfgContainer [2020-09-25 07:51:42,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:51:42,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:51:42,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:51:42,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:51:42,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:51:39" (1/3) ... [2020-09-25 07:51:42,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68751017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:51:42, skipping insertion in model container [2020-09-25 07:51:42,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:51:40" (2/3) ... [2020-09-25 07:51:42,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68751017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:51:42, skipping insertion in model container [2020-09-25 07:51:42,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:51:42" (3/3) ... [2020-09-25 07:51:42,380 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label38.c [2020-09-25 07:51:42,392 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:51:42,404 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:51:42,428 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:51:42,465 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:51:42,465 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:51:42,465 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:51:42,466 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:51:42,466 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:51:42,466 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:51:42,466 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:51:42,466 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:51:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 07:51:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 07:51:42,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:42,522 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] [2020-09-25 07:51:42,523 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash -857113145, now seen corresponding path program 1 times [2020-09-25 07:51:42,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:42,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866462069] [2020-09-25 07:51:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:42,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:43,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:45,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:45,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:47,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:47,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 07:51:47,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 07:51:47,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 07:51:47,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:47,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:51:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 07:51:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 07:51:47,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 07:51:47,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:51:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:48,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:48,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 07:51:48,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:48,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 07:51:48,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:48,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:48,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:51:48,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 07:51:48,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:48,076 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 07:51:48,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866462069] [2020-09-25 07:51:48,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:51:48,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:51:48,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129034687] [2020-09-25 07:51:48,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:51:48,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:51:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:51:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:51:48,113 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 07:51:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:51:50,494 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 07:51:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 07:51:50,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-09-25 07:51:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:51:50,523 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 07:51:50,524 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 07:51:50,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 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 07:51:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 07:51:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 07:51:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 07:51:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 07:51:50,673 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 110 [2020-09-25 07:51:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:51:50,675 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 07:51:50,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:51:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 07:51:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 07:51:50,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:50,691 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-09-25 07:51:50,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:51:50,692 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash -431161361, now seen corresponding path program 1 times [2020-09-25 07:51:50,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:50,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287471134] [2020-09-25 07:51:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:50,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:51,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:52,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:53,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:53,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:54,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:55,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:55,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:55,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-25 07:51:55,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 07:51:55,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 07:51:55,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:55,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:51:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 07:51:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-25 07:51:55,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:55,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:51:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:55,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:55,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:55,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 07:51:55,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:55,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 07:51:55,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:55,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:51:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:55,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:51:55,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:55,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 07:51:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:55,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:55,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:55,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 07:51:55,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:55,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 07:51:55,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:55,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:51:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 07:51:55,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:51:56,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287471134] [2020-09-25 07:51:56,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:51:56,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 07:51:56,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100614718] [2020-09-25 07:51:56,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 07:51:56,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:51:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 07:51:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:51:56,025 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 6 states. [2020-09-25 07:51:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:51:58,801 INFO L93 Difference]: Finished difference Result 1877 states and 2385 transitions. [2020-09-25 07:51:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 07:51:58,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-09-25 07:51:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:51:58,812 INFO L225 Difference]: With dead ends: 1877 [2020-09-25 07:51:58,812 INFO L226 Difference]: Without dead ends: 1298 [2020-09-25 07:51:58,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 07:51:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2020-09-25 07:51:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1034. [2020-09-25 07:51:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-09-25 07:51:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1310 transitions. [2020-09-25 07:51:58,882 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1310 transitions. Word has length 131 [2020-09-25 07:51:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:51:58,882 INFO L479 AbstractCegarLoop]: Abstraction has 1034 states and 1310 transitions. [2020-09-25 07:51:58,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 07:51:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1310 transitions. [2020-09-25 07:51:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-25 07:51:58,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:58,888 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-09-25 07:51:58,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:51:58,889 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:58,889 INFO L82 PathProgramCache]: Analyzing trace with hash 39430160, now seen corresponding path program 1 times [2020-09-25 07:51:58,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:58,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110319115] [2020-09-25 07:51:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:59,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:59,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:59,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:59,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:00,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:03,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:03,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-25 07:52:03,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 07:52:03,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 07:52:03,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:03,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:03,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:52:03,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-25 07:52:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-25 07:52:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:52:04,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:52:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:04,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:04,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:04,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 07:52:04,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:52:04,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 07:52:04,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:04,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:04,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:52:04,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:52:04,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:52:04,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:52:04,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 07:52:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:04,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:04,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:04,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 07:52:04,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:52:04,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 07:52:04,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:04,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:04,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:52:04,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:52:04,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 07:52:04,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:52:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:52:04,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110319115] [2020-09-25 07:52:04,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:52:04,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:52:04,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005490829] [2020-09-25 07:52:04,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:52:04,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:52:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:52:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:52:04,214 INFO L87 Difference]: Start difference. First operand 1034 states and 1310 transitions. Second operand 5 states. [2020-09-25 07:52:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:52:06,470 INFO L93 Difference]: Finished difference Result 2483 states and 3245 transitions. [2020-09-25 07:52:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:52:06,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2020-09-25 07:52:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:52:06,479 INFO L225 Difference]: With dead ends: 2483 [2020-09-25 07:52:06,479 INFO L226 Difference]: Without dead ends: 998 [2020-09-25 07:52:06,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 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 07:52:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-09-25 07:52:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 988. [2020-09-25 07:52:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-09-25 07:52:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1231 transitions. [2020-09-25 07:52:06,525 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1231 transitions. Word has length 140 [2020-09-25 07:52:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:52:06,527 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 1231 transitions. [2020-09-25 07:52:06,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:52:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1231 transitions. [2020-09-25 07:52:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-25 07:52:06,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:52:06,533 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] [2020-09-25 07:52:06,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:52:06,541 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:52:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:52:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash -439956008, now seen corresponding path program 1 times [2020-09-25 07:52:06,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:52:06,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617921947] [2020-09-25 07:52:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:52:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:06,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:06,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:07,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:07,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:11,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:11,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:11,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 07:52:11,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 07:52:11,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-09-25 07:52:11,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:11,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:52:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-09-25 07:52:11,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-25 07:52:11,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:52:11,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:52:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:11,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:11,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:11,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 07:52:11,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:52:11,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 07:52:11,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:11,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:11,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:52:11,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:52:11,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:52:11,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:52:11,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 07:52:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:11,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:11,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:11,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 07:52:11,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:52:11,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 07:52:11,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:11,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:52:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:52:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 07:52:11,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:52:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:52:11,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617921947] [2020-09-25 07:52:11,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:52:11,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:52:11,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142200940] [2020-09-25 07:52:11,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:52:11,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:52:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:52:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:52:11,870 INFO L87 Difference]: Start difference. First operand 988 states and 1231 transitions. Second operand 5 states. [2020-09-25 07:52:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:52:13,728 INFO L93 Difference]: Finished difference Result 2684 states and 3490 transitions. [2020-09-25 07:52:13,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:52:13,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-09-25 07:52:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:52:13,746 INFO L225 Difference]: With dead ends: 2684 [2020-09-25 07:52:13,747 INFO L226 Difference]: Without dead ends: 1720 [2020-09-25 07:52:13,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 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 07:52:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2020-09-25 07:52:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1276. [2020-09-25 07:52:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-09-25 07:52:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1571 transitions. [2020-09-25 07:52:13,835 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1571 transitions. Word has length 147 [2020-09-25 07:52:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:52:13,836 INFO L479 AbstractCegarLoop]: Abstraction has 1276 states and 1571 transitions. [2020-09-25 07:52:13,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:52:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1571 transitions. [2020-09-25 07:52:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-25 07:52:13,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:52:13,842 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] [2020-09-25 07:52:13,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:52:13,843 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:52:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:52:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1709240601, now seen corresponding path program 1 times [2020-09-25 07:52:13,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:52:13,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890033588] [2020-09-25 07:52:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:52:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:13,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:14,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:14,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:14,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:14,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:16,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:18,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:18,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 07:52:18,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 07:52:18,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 07:52:18,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:18,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:18,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:52:18,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-09-25 07:52:18,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-25 07:52:18,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:52:18,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:52:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:19,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:19,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:19,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 07:52:19,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:52:19,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:52:19,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:19,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:52:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:52:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:52:19,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:52:19,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 07:52:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:19,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:52:19,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 07:52:19,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:52:19,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 07:52:19,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:52:19,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:52:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:52:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:52:19,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 07:52:19,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:52:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:52:19,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890033588] [2020-09-25 07:52:19,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:52:19,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:52:19,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205532655] [2020-09-25 07:52:19,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:52:19,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:52:19,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:52:19,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:52:19,145 INFO L87 Difference]: Start difference. First operand 1276 states and 1571 transitions. Second operand 5 states. [2020-09-25 07:52:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:52:20,792 INFO L93 Difference]: Finished difference Result 3123 states and 3938 transitions. [2020-09-25 07:52:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:52:20,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-09-25 07:52:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:52:20,816 INFO L225 Difference]: With dead ends: 3123 [2020-09-25 07:52:20,816 INFO L226 Difference]: Without dead ends: 1871 [2020-09-25 07:52:20,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 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 07:52:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2020-09-25 07:52:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1848. [2020-09-25 07:52:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1848 states. [2020-09-25 07:52:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2251 transitions. [2020-09-25 07:52:20,903 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2251 transitions. Word has length 153 [2020-09-25 07:52:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:52:20,904 INFO L479 AbstractCegarLoop]: Abstraction has 1848 states and 2251 transitions. [2020-09-25 07:52:20,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:52:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2251 transitions. [2020-09-25 07:52:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 07:52:20,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:52:20,913 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, 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] [2020-09-25 07:52:20,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 07:52:20,914 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:52:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:52:20,914 INFO L82 PathProgramCache]: Analyzing trace with hash 926609686, now seen corresponding path program 1 times [2020-09-25 07:52:20,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:52:20,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833339085] [2020-09-25 07:52:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:52:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:52:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:21,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:21,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:21,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:21,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:22,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:52:22,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking...