/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=0.2 --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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:14:03,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:14:03,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:14:03,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:14:03,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:14:03,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:14:03,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:14:04,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:14:04,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:14:04,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:14:04,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:14:04,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:14:04,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:14:04,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:14:04,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:14:04,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:14:04,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:14:04,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:14:04,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:14:04,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:14:04,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:14:04,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:14:04,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:14:04,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:14:04,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:14:04,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:14:04,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:14:04,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:14:04,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:14:04,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:14:04,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:14:04,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:14:04,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:14:04,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:14:04,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:14:04,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:14:04,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:14:04,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:14:04,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:14:04,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:14:04,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:14:04,037 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 11:14:04,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:14:04,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:14:04,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:14:04,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:14:04,065 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:14:04,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:14:04,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:14:04,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:14:04,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:14:04,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:14:04,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:14:04,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:14:04,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:14:04,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:14:04,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:14:04,067 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:14:04,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:14:04,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:14:04,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:14:04,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:14:04,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:14:04,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:14:04,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:14:04,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:14:04,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:14:04,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:14:04,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:14:04,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:14:04,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:14:04,070 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:14:04,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:14:04,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:14:04,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:14:04,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:14:04,587 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:14:04,589 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2020-09-25 11:14:04,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6f218435/3cdb0ad65f86469cbf12a6942ba24ecb/FLAG3a80e3c64 [2020-09-25 11:14:05,278 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:14:05,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2020-09-25 11:14:05,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6f218435/3cdb0ad65f86469cbf12a6942ba24ecb/FLAG3a80e3c64 [2020-09-25 11:14:05,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6f218435/3cdb0ad65f86469cbf12a6942ba24ecb [2020-09-25 11:14:05,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:14:05,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:14:05,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:05,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:14:05,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:14:05,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:05" (1/1) ... [2020-09-25 11:14:05,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:05, skipping insertion in model container [2020-09-25 11:14:05,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:05" (1/1) ... [2020-09-25 11:14:05,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:14:05,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:14:06,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:06,109 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:14:06,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:06,377 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:14:06,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06 WrapperNode [2020-09-25 11:14:06,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:06,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:14:06,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:14:06,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:14:06,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (1/1) ... [2020-09-25 11:14:06,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (1/1) ... [2020-09-25 11:14:06,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (1/1) ... [2020-09-25 11:14:06,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (1/1) ... [2020-09-25 11:14:06,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (1/1) ... [2020-09-25 11:14:06,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (1/1) ... [2020-09-25 11:14:06,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (1/1) ... [2020-09-25 11:14:06,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:14:06,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:14:06,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:14:06,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:14:06,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (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 11:14:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:14:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:14:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:14:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:14:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:14:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:14:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:14:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:14:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:14:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:14:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:14:07,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:14:07,968 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:14:07,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:07 BoogieIcfgContainer [2020-09-25 11:14:07,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:14:07,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:14:07,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:14:07,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:14:07,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:14:05" (1/3) ... [2020-09-25 11:14:07,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:07, skipping insertion in model container [2020-09-25 11:14:07,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:06" (2/3) ... [2020-09-25 11:14:07,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:07, skipping insertion in model container [2020-09-25 11:14:07,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:07" (3/3) ... [2020-09-25 11:14:07,989 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label35.c [2020-09-25 11:14:08,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:14:08,014 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:14:08,038 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:14:08,078 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:14:08,079 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:14:08,079 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:14:08,079 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:14:08,079 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:14:08,079 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:14:08,080 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:14:08,080 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:14:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:14:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-25 11:14:08,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:08,138 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] [2020-09-25 11:14:08,139 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash -850053121, now seen corresponding path program 1 times [2020-09-25 11:14:08,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:08,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251981973] [2020-09-25 11:14:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:08,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:08,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:09,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:10,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:10,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:11,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:13,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:13,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-25 11:14:13,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:14:13,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 11:14:13,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:13,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:13,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:14:13,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 11:14:13,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 11:14:13,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:14:13,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:13,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:13,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:13,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:13,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:13,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 11:14:13,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:13,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:14:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:13,760 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 11:14:13,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251981973] [2020-09-25 11:14:13,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:14:13,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:14:13,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514595318] [2020-09-25 11:14:13,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:14:13,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:14:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:14:13,795 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 11:14:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:16,120 INFO L93 Difference]: Finished difference Result 1231 states and 1630 transitions. [2020-09-25 11:14:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:14:16,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-09-25 11:14:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:16,166 INFO L225 Difference]: With dead ends: 1231 [2020-09-25 11:14:16,166 INFO L226 Difference]: Without dead ends: 657 [2020-09-25 11:14:16,179 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 11:14:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-09-25 11:14:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 603. [2020-09-25 11:14:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 11:14:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 707 transitions. [2020-09-25 11:14:16,357 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 707 transitions. Word has length 108 [2020-09-25 11:14:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:16,360 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 707 transitions. [2020-09-25 11:14:16,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:14:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 707 transitions. [2020-09-25 11:14:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-25 11:14:16,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:16,373 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-09-25 11:14:16,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:14:16,374 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 626429774, now seen corresponding path program 1 times [2020-09-25 11:14:16,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:16,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035782425] [2020-09-25 11:14:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:16,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:16,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:16,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-25 11:14:16,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:16,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-09-25 11:14:16,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:16,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 11:14:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 11:14:16,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:17,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:17,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:17,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:17,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:17,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:17,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 11:14:17,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:17,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:17,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:17,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:17,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:17,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:17,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:17,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 11:14:17,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:17,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:17,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:17,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:17,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 11:14:17,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:14:17,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035782425] [2020-09-25 11:14:17,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:17,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:14:17,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310738554] [2020-09-25 11:14:17,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:14:17,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:14:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:14:17,131 INFO L87 Difference]: Start difference. First operand 603 states and 707 transitions. Second operand 5 states. [2020-09-25 11:14:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:19,162 INFO L93 Difference]: Finished difference Result 1499 states and 1830 transitions. [2020-09-25 11:14:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:14:19,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-09-25 11:14:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:19,170 INFO L225 Difference]: With dead ends: 1499 [2020-09-25 11:14:19,170 INFO L226 Difference]: Without dead ends: 920 [2020-09-25 11:14:19,173 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 11:14:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-09-25 11:14:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 891. [2020-09-25 11:14:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2020-09-25 11:14:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1042 transitions. [2020-09-25 11:14:19,208 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1042 transitions. Word has length 129 [2020-09-25 11:14:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:19,209 INFO L479 AbstractCegarLoop]: Abstraction has 891 states and 1042 transitions. [2020-09-25 11:14:19,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:14:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1042 transitions. [2020-09-25 11:14:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-25 11:14:19,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:19,213 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] [2020-09-25 11:14:19,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:14:19,213 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1590256115, now seen corresponding path program 1 times [2020-09-25 11:14:19,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:19,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126514915] [2020-09-25 11:14:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:19,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:19,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:19,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:20,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:20,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:22,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:23,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:23,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:23,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:24,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:24,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:24,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-25 11:14:24,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-25 11:14:24,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-09-25 11:14:24,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:24,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 11:14:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-25 11:14:24,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:14:24,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:24,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:24,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:24,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 11:14:24,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:24,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:24,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:24,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:24,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:24,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 11:14:24,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:24,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 11:14:24,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:24,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:24,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:24,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 11:14:24,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:24,519 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 11:14:24,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126514915] [2020-09-25 11:14:24,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:24,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:14:24,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240534370] [2020-09-25 11:14:24,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:14:24,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:14:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:14:24,523 INFO L87 Difference]: Start difference. First operand 891 states and 1042 transitions. Second operand 5 states. [2020-09-25 11:14:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:26,616 INFO L93 Difference]: Finished difference Result 2434 states and 2927 transitions. [2020-09-25 11:14:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:14:26,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-09-25 11:14:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:26,626 INFO L225 Difference]: With dead ends: 2434 [2020-09-25 11:14:26,627 INFO L226 Difference]: Without dead ends: 1411 [2020-09-25 11:14:26,636 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 11:14:26,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2020-09-25 11:14:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1332. [2020-09-25 11:14:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2020-09-25 11:14:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1570 transitions. [2020-09-25 11:14:26,699 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1570 transitions. Word has length 130 [2020-09-25 11:14:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:26,701 INFO L479 AbstractCegarLoop]: Abstraction has 1332 states and 1570 transitions. [2020-09-25 11:14:26,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:14:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1570 transitions. [2020-09-25 11:14:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-25 11:14:26,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:26,706 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 11:14:26,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:14:26,706 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:26,708 INFO L82 PathProgramCache]: Analyzing trace with hash 660938890, now seen corresponding path program 1 times [2020-09-25 11:14:26,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:26,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439258026] [2020-09-25 11:14:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:26,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:26,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:27,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:27,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:31,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:31,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-25 11:14:31,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:14:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 11:14:31,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:31,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:31,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:14:31,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:14:31,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-25 11:14:31,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:31,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:31,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:31,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:31,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:31,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 11:14:31,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:31,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:31,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:14:31,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:32,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:32,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:32,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:32,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:32,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:14:32,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:32,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 11:14:32,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:32,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:32,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:32,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:32,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 11:14:32,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 11:14:32,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439258026] [2020-09-25 11:14:32,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:32,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:14:32,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982969383] [2020-09-25 11:14:32,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:14:32,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:14:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:14:32,185 INFO L87 Difference]: Start difference. First operand 1332 states and 1570 transitions. Second operand 6 states. [2020-09-25 11:14:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:34,024 INFO L93 Difference]: Finished difference Result 3248 states and 3926 transitions. [2020-09-25 11:14:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:14:34,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2020-09-25 11:14:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:34,038 INFO L225 Difference]: With dead ends: 3248 [2020-09-25 11:14:34,038 INFO L226 Difference]: Without dead ends: 1940 [2020-09-25 11:14:34,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:14:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2020-09-25 11:14:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1910. [2020-09-25 11:14:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1910 states. [2020-09-25 11:14:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2281 transitions. [2020-09-25 11:14:34,107 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2281 transitions. Word has length 137 [2020-09-25 11:14:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:34,108 INFO L479 AbstractCegarLoop]: Abstraction has 1910 states and 2281 transitions. [2020-09-25 11:14:34,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:14:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2281 transitions. [2020-09-25 11:14:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-25 11:14:34,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:34,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 11:14:34,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:14:34,116 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash -247402504, now seen corresponding path program 1 times [2020-09-25 11:14:34,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:34,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331350546] [2020-09-25 11:14:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:34,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:39,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:39,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-25 11:14:39,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:14:39,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:14:39,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:39,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:14:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 11:14:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 11:14:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:39,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:39,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:39,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:39,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:39,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:39,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 11:14:39,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:39,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:39,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:14:39,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:39,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:14:39,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 11:14:39,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:39,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:39,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:39,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:39,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:39,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-25 11:14:39,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:39,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:39,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:14:39,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:39,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 11:14:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:39,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:39,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:39,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 11:14:39,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:39,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 11:14:39,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:39,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:39,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:39,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:39,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:14:39,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 11:14:39,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331350546] [2020-09-25 11:14:39,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:39,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:14:39,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908294876] [2020-09-25 11:14:39,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:14:39,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:14:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:14:39,682 INFO L87 Difference]: Start difference. First operand 1910 states and 2281 transitions. Second operand 9 states. [2020-09-25 11:14:40,652 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-25 11:14:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:42,681 INFO L93 Difference]: Finished difference Result 4465 states and 5412 transitions. [2020-09-25 11:14:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 11:14:42,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 154 [2020-09-25 11:14:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:42,696 INFO L225 Difference]: With dead ends: 4465 [2020-09-25 11:14:42,696 INFO L226 Difference]: Without dead ends: 2232 [2020-09-25 11:14:42,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:14:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2020-09-25 11:14:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1888. [2020-09-25 11:14:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1888 states. [2020-09-25 11:14:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2121 transitions. [2020-09-25 11:14:42,758 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2121 transitions. Word has length 154 [2020-09-25 11:14:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:42,759 INFO L479 AbstractCegarLoop]: Abstraction has 1888 states and 2121 transitions. [2020-09-25 11:14:42,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:14:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2121 transitions. [2020-09-25 11:14:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 11:14:42,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:42,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 11:14:42,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:14:42,765 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1134242450, now seen corresponding path program 1 times [2020-09-25 11:14:42,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:42,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662618691] [2020-09-25 11:14:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:42,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:42,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:45,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:45,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:46,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:46,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:46,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:47,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-09-25 11:14:47,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-09-25 11:14:47,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 11:14:47,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:47,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:47,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 11:14:47,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:14:47,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-25 11:14:47,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:47,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:47,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:47,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:47,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:47,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 11:14:47,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:47,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:14:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:47,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:47,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:48,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:48,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:14:48,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:14:48,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:48,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 11:14:48,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:48,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 11:14:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:48,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:48,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:48,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:14:48,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:48,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-25 11:14:48,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:48,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:14:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:14:48,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:48,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-25 11:14:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:48,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:48,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 11:14:48,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 11:14:48,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:48,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:14:48,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 11:14:48,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662618691] [2020-09-25 11:14:48,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:48,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:14:48,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226477281] [2020-09-25 11:14:48,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:14:48,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:14:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:14:48,381 INFO L87 Difference]: Start difference. First operand 1888 states and 2121 transitions. Second operand 11 states. [2020-09-25 11:14:48,663 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-25 11:14:49,886 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-09-25 11:14:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:51,901 INFO L93 Difference]: Finished difference Result 4372 states and 5048 transitions. [2020-09-25 11:14:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 11:14:51,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 176 [2020-09-25 11:14:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:51,912 INFO L225 Difference]: With dead ends: 4372 [2020-09-25 11:14:51,912 INFO L226 Difference]: Without dead ends: 1825 [2020-09-25 11:14:51,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-09-25 11:14:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2020-09-25 11:14:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1537. [2020-09-25 11:14:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2020-09-25 11:14:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1677 transitions. [2020-09-25 11:14:51,968 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1677 transitions. Word has length 176 [2020-09-25 11:14:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:51,968 INFO L479 AbstractCegarLoop]: Abstraction has 1537 states and 1677 transitions. [2020-09-25 11:14:51,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:14:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1677 transitions. [2020-09-25 11:14:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 11:14:51,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:51,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 11:14:51,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:14:51,973 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:51,974 INFO L82 PathProgramCache]: Analyzing trace with hash 900247765, now seen corresponding path program 1 times [2020-09-25 11:14:51,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:51,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671820903] [2020-09-25 11:14:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:52,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:52,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:53,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:53,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking...