/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 13:40:30,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 13:40:30,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 13:40:30,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 13:40:30,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 13:40:30,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 13:40:30,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 13:40:30,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 13:40:30,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 13:40:30,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 13:40:30,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 13:40:30,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 13:40:30,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 13:40:30,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 13:40:30,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 13:40:30,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 13:40:30,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 13:40:30,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 13:40:30,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 13:40:30,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 13:40:30,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 13:40:30,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 13:40:30,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 13:40:30,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 13:40:30,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 13:40:30,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 13:40:30,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 13:40:30,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 13:40:30,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 13:40:30,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 13:40:30,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 13:40:30,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 13:40:30,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 13:40:30,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 13:40:30,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 13:40:30,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 13:40:30,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 13:40:30,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 13:40:30,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 13:40:30,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 13:40:30,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 13:40:30,198 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 [2020-10-12 13:40:30,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 13:40:30,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 13:40:30,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 13:40:30,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 13:40:30,225 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 13:40:30,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 13:40:30,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 13:40:30,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 13:40:30,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 13:40:30,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 13:40:30,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 13:40:30,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 13:40:30,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 13:40:30,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 13:40:30,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 13:40:30,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 13:40:30,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 13:40:30,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 13:40:30,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 13:40:30,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 13:40:30,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 13:40:30,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 13:40:30,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 13:40:30,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 13:40:30,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 13:40:30,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 13:40:30,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 13:40:30,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 13:40:30,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 13:40:30,231 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 13:40:30,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 13:40:30,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 13:40:30,619 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 13:40:30,621 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 13:40:30,622 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 13:40:30,623 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2020-10-12 13:40:30,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b172c1d7f/bdd2d482e64440a49a5bbe1b3a600996/FLAGe10b52409 [2020-10-12 13:40:31,768 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 13:40:31,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2020-10-12 13:40:31,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b172c1d7f/bdd2d482e64440a49a5bbe1b3a600996/FLAGe10b52409 [2020-10-12 13:40:32,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b172c1d7f/bdd2d482e64440a49a5bbe1b3a600996 [2020-10-12 13:40:32,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 13:40:32,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 13:40:32,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 13:40:32,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 13:40:32,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 13:40:32,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:40:32" (1/1) ... [2020-10-12 13:40:32,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347c51ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:32, skipping insertion in model container [2020-10-12 13:40:32,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:40:32" (1/1) ... [2020-10-12 13:40:32,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 13:40:32,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 13:40:34,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:40:34,199 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 13:40:35,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:40:35,403 INFO L208 MainTranslator]: Completed translation [2020-10-12 13:40:35,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35 WrapperNode [2020-10-12 13:40:35,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 13:40:35,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 13:40:35,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 13:40:35,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 13:40:35,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (1/1) ... [2020-10-12 13:40:35,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (1/1) ... [2020-10-12 13:40:35,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (1/1) ... [2020-10-12 13:40:35,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (1/1) ... [2020-10-12 13:40:35,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (1/1) ... [2020-10-12 13:40:35,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (1/1) ... [2020-10-12 13:40:35,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (1/1) ... [2020-10-12 13:40:35,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 13:40:35,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 13:40:35,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 13:40:35,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 13:40:35,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (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 [2020-10-12 13:40:36,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 13:40:36,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 13:40:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 13:40:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 13:40:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 13:40:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 13:40:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 13:40:36,014 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 13:40:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 13:40:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 13:40:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 13:40:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 13:40:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 13:40:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 13:40:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 13:40:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 13:40:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 13:40:48,937 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 13:40:48,938 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 13:40:48,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:40:48 BoogieIcfgContainer [2020-10-12 13:40:48,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 13:40:48,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 13:40:48,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 13:40:48,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 13:40:48,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 01:40:32" (1/3) ... [2020-10-12 13:40:48,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a25737f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:40:48, skipping insertion in model container [2020-10-12 13:40:48,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:35" (2/3) ... [2020-10-12 13:40:48,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a25737f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:40:48, skipping insertion in model container [2020-10-12 13:40:48,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:40:48" (3/3) ... [2020-10-12 13:40:48,972 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label26.c [2020-10-12 13:40:48,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 13:40:49,001 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 13:40:49,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 13:40:49,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 13:40:49,063 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 13:40:49,063 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 13:40:49,063 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 13:40:49,063 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 13:40:49,064 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 13:40:49,064 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 13:40:49,064 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 13:40:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-12 13:40:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 13:40:49,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:40:49,129 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] [2020-10-12 13:40:49,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:40:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:40:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1734538977, now seen corresponding path program 1 times [2020-10-12 13:40:49,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:40:49,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954130818] [2020-10-12 13:40:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:40:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:40:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:49,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:40:49,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 13:40:49,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:40:49,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-12 13:40:49,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:40:49,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:40:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:40:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 13:40:49,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:40:50,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:40:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:40:50,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:50,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:40:50,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:40:50,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:40:50,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 13:40:50,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:40:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:40:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:40:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:40:50,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:40:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:40:50,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954130818] [2020-10-12 13:40:50,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:40:50,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 13:40:50,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142006445] [2020-10-12 13:40:50,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 13:40:50,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:40:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 13:40:50,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 13:40:50,176 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-12 13:41:08,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:41:08,491 INFO L93 Difference]: Finished difference Result 3152 states and 5831 transitions. [2020-10-12 13:41:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:41:08,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-12 13:41:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:41:08,544 INFO L225 Difference]: With dead ends: 3152 [2020-10-12 13:41:08,544 INFO L226 Difference]: Without dead ends: 1954 [2020-10-12 13:41:08,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:41:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-12 13:41:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1885. [2020-10-12 13:41:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-12 13:41:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3103 transitions. [2020-10-12 13:41:08,763 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3103 transitions. Word has length 44 [2020-10-12 13:41:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:41:08,764 INFO L479 AbstractCegarLoop]: Abstraction has 1885 states and 3103 transitions. [2020-10-12 13:41:08,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 13:41:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3103 transitions. [2020-10-12 13:41:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 13:41:08,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:41:08,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:41:08,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 13:41:08,773 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:41:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:41:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 682848630, now seen corresponding path program 1 times [2020-10-12 13:41:08,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:41:08,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377142317] [2020-10-12 13:41:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:41:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:08,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:09,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:10,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:10,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 13:41:10,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:41:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1637 [2020-10-12 13:41:10,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:41:10,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:41:10,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:41:10,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 13:41:10,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:41:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:10,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:10,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:41:10,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:10,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 13:41:10,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:41:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:41:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:10,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:41:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:10,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:11,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:11,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 13:41:11,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:11,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-12 13:41:11,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:41:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:41:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 13:41:11,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-12 13:41:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:41:11,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377142317] [2020-10-12 13:41:11,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:41:11,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:41:11,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146501314] [2020-10-12 13:41:11,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:41:11,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:41:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:41:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:41:11,257 INFO L87 Difference]: Start difference. First operand 1885 states and 3103 transitions. Second operand 7 states. [2020-10-12 13:41:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:41:44,990 INFO L93 Difference]: Finished difference Result 5586 states and 9229 transitions. [2020-10-12 13:41:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 13:41:44,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-12 13:41:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:41:45,021 INFO L225 Difference]: With dead ends: 5586 [2020-10-12 13:41:45,022 INFO L226 Difference]: Without dead ends: 3707 [2020-10-12 13:41:45,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:41:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2020-10-12 13:41:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3609. [2020-10-12 13:41:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3609 states. [2020-10-12 13:41:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 5369 transitions. [2020-10-12 13:41:45,188 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 5369 transitions. Word has length 114 [2020-10-12 13:41:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:41:45,189 INFO L479 AbstractCegarLoop]: Abstraction has 3609 states and 5369 transitions. [2020-10-12 13:41:45,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:41:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 5369 transitions. [2020-10-12 13:41:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-12 13:41:45,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:41:45,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:41:45,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 13:41:45,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:41:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:41:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash -700440297, now seen corresponding path program 1 times [2020-10-12 13:41:45,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:41:45,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687404000] [2020-10-12 13:41:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:41:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:45,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:45,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:46,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:46,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-12 13:41:46,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:41:46,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1479 [2020-10-12 13:41:46,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:46,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:41:46,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:41:46,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-12 13:41:46,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:46,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:41:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:46,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:46,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:41:46,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:46,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 13:41:46,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:46,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:41:46,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:46,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:41:46,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:47,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:41:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:47,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:47,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:47,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:47,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:41:47,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:41:47,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-12 13:41:47,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:41:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:41:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 13:41:47,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 13:41:47,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687404000] [2020-10-12 13:41:47,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:41:47,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:41:47,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956988234] [2020-10-12 13:41:47,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 13:41:47,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:41:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 13:41:47,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:41:47,549 INFO L87 Difference]: Start difference. First operand 3609 states and 5369 transitions. Second operand 6 states. [2020-10-12 13:42:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:42:05,420 INFO L93 Difference]: Finished difference Result 10647 states and 16077 transitions. [2020-10-12 13:42:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 13:42:05,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2020-10-12 13:42:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:42:05,459 INFO L225 Difference]: With dead ends: 10647 [2020-10-12 13:42:05,460 INFO L226 Difference]: Without dead ends: 7044 [2020-10-12 13:42:05,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:42:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7044 states. [2020-10-12 13:42:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7044 to 7010. [2020-10-12 13:42:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7010 states. [2020-10-12 13:42:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7010 states to 7010 states and 9329 transitions. [2020-10-12 13:42:05,690 INFO L78 Accepts]: Start accepts. Automaton has 7010 states and 9329 transitions. Word has length 121 [2020-10-12 13:42:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:42:05,692 INFO L479 AbstractCegarLoop]: Abstraction has 7010 states and 9329 transitions. [2020-10-12 13:42:05,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 13:42:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 7010 states and 9329 transitions. [2020-10-12 13:42:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-12 13:42:05,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:42:05,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:42:05,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 13:42:05,707 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:42:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:42:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1086686153, now seen corresponding path program 1 times [2020-10-12 13:42:05,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:42:05,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936383764] [2020-10-12 13:42:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:42:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:06,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:07,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:07,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 13:42:07,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:42:07,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1545 [2020-10-12 13:42:07,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:42:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:42:07,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-12 13:42:07,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:42:07,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:42:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:07,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:07,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:07,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:42:07,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:07,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 13:42:07,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:42:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:42:07,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:42:07,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:07,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:42:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:07,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:07,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:42:07,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:07,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-12 13:42:07,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:07,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:42:07,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:42:07,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:42:07,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 13:42:07,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936383764] [2020-10-12 13:42:07,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:42:07,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:42:07,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473923942] [2020-10-12 13:42:07,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 13:42:07,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:42:07,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 13:42:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:42:07,711 INFO L87 Difference]: Start difference. First operand 7010 states and 9329 transitions. Second operand 6 states. [2020-10-12 13:42:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:42:26,206 INFO L93 Difference]: Finished difference Result 15022 states and 20560 transitions. [2020-10-12 13:42:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 13:42:26,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2020-10-12 13:42:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:42:26,252 INFO L225 Difference]: With dead ends: 15022 [2020-10-12 13:42:26,252 INFO L226 Difference]: Without dead ends: 8018 [2020-10-12 13:42:26,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:42:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8018 states. [2020-10-12 13:42:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8018 to 7944. [2020-10-12 13:42:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7944 states. [2020-10-12 13:42:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7944 states to 7944 states and 10579 transitions. [2020-10-12 13:42:26,499 INFO L78 Accepts]: Start accepts. Automaton has 7944 states and 10579 transitions. Word has length 137 [2020-10-12 13:42:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:42:26,501 INFO L479 AbstractCegarLoop]: Abstraction has 7944 states and 10579 transitions. [2020-10-12 13:42:26,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 13:42:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7944 states and 10579 transitions. [2020-10-12 13:42:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 13:42:26,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:42:26,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:42:26,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 13:42:26,505 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:42:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:42:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1118915273, now seen corresponding path program 1 times [2020-10-12 13:42:26,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:42:26,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573468423] [2020-10-12 13:42:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:42:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:26,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:26,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:27,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:27,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-12 13:42:27,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:42:27,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1119 [2020-10-12 13:42:27,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:27,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:42:27,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:42:27,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-12 13:42:27,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:27,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:42:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:27,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:27,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:27,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:42:27,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:27,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 13:42:27,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:42:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:42:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:42:27,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:27,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:42:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:27,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:28,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:28,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 13:42:28,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:28,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-12 13:42:28,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:28,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:42:28,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:42:28,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 13:42:28,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:42:28,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573468423] [2020-10-12 13:42:28,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:42:28,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:42:28,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562072304] [2020-10-12 13:42:28,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:42:28,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:42:28,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:42:28,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:42:28,156 INFO L87 Difference]: Start difference. First operand 7944 states and 10579 transitions. Second operand 7 states. [2020-10-12 13:42:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:42:50,221 INFO L93 Difference]: Finished difference Result 21403 states and 30317 transitions. [2020-10-12 13:42:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 13:42:50,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2020-10-12 13:42:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:42:50,283 INFO L225 Difference]: With dead ends: 21403 [2020-10-12 13:42:50,283 INFO L226 Difference]: Without dead ends: 14268 [2020-10-12 13:42:50,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:42:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2020-10-12 13:42:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 14130. [2020-10-12 13:42:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14130 states. [2020-10-12 13:42:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14130 states to 14130 states and 18304 transitions. [2020-10-12 13:42:50,664 INFO L78 Accepts]: Start accepts. Automaton has 14130 states and 18304 transitions. Word has length 153 [2020-10-12 13:42:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:42:50,664 INFO L479 AbstractCegarLoop]: Abstraction has 14130 states and 18304 transitions. [2020-10-12 13:42:50,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:42:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 14130 states and 18304 transitions. [2020-10-12 13:42:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-12 13:42:50,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:42:50,671 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-12 13:42:50,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 13:42:50,672 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:42:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:42:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash 672066281, now seen corresponding path program 1 times [2020-10-12 13:42:50,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:42:50,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547598388] [2020-10-12 13:42:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:42:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:50,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:50,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:51,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:52,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:55,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:55,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:55,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-12 13:42:55,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 13:42:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 13:42:55,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:42:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:42:55,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-12 13:42:55,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:55,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:42:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:55,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:55,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:42:55,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:55,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 13:42:55,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:55,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:42:55,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:42:55,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:42:55,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:55,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:42:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:55,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:55,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:55,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:42:55,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:55,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-12 13:42:55,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:55,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:42:55,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:42:55,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:42:55,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:56,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 13:42:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:56,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:56,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:56,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 13:42:56,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:42:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-12 13:42:56,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:42:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:42:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 13:42:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:42:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-12 13:42:56,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547598388] [2020-10-12 13:42:56,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:42:56,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 13:42:56,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494857508] [2020-10-12 13:42:56,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:42:56,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:42:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:42:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:42:56,642 INFO L87 Difference]: Start difference. First operand 14130 states and 18304 transitions. Second operand 7 states. [2020-10-12 13:43:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:43:19,722 INFO L93 Difference]: Finished difference Result 25280 states and 33377 transitions. [2020-10-12 13:43:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:43:19,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 257 [2020-10-12 13:43:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:43:19,787 INFO L225 Difference]: With dead ends: 25280 [2020-10-12 13:43:19,788 INFO L226 Difference]: Without dead ends: 14428 [2020-10-12 13:43:19,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:43:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14428 states. [2020-10-12 13:43:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14428 to 14274. [2020-10-12 13:43:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14274 states. [2020-10-12 13:43:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14274 states to 14274 states and 18466 transitions. [2020-10-12 13:43:20,250 INFO L78 Accepts]: Start accepts. Automaton has 14274 states and 18466 transitions. Word has length 257 [2020-10-12 13:43:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:43:20,251 INFO L479 AbstractCegarLoop]: Abstraction has 14274 states and 18466 transitions. [2020-10-12 13:43:20,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:43:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 14274 states and 18466 transitions. [2020-10-12 13:43:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-12 13:43:20,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:43:20,257 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-12 13:43:20,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 13:43:20,258 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:43:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:43:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1056585326, now seen corresponding path program 1 times [2020-10-12 13:43:20,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:43:20,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674821100] [2020-10-12 13:43:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:43:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:21,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:24,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:24,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-12 13:43:24,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 13:43:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4156 [2020-10-12 13:43:24,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 13:43:24,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:43:24,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 272 [2020-10-12 13:43:24,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:24,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:43:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:24,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:24,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:24,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:43:24,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:43:24,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 13:43:24,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:24,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:43:24,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:43:24,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:43:24,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:24,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:43:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:24,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:24,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:25,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:25,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:43:25,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:43:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-12 13:43:25,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:43:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:43:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 13:43:25,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 13:43:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:25,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:25,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:25,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:25,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:43:25,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:43:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-12 13:43:25,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:43:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:43:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:43:25,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:43:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 12 proven. 151 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 13:43:27,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674821100] [2020-10-12 13:43:27,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:43:27,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 13:43:27,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964018830] [2020-10-12 13:43:27,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 13:43:27,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:43:27,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 13:43:27,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:43:27,616 INFO L87 Difference]: Start difference. First operand 14274 states and 18466 transitions. Second operand 12 states. [2020-10-12 13:43:27,798 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-10-12 13:43:28,088 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-12 13:43:28,691 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-10-12 13:43:28,918 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-12 13:43:31,175 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-12 13:43:32,784 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-12 13:43:33,372 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-12 13:43:33,759 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-12 13:43:34,087 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 13:43:34,670 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-12 13:43:35,034 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-12 13:43:35,403 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-12 13:43:35,614 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-12 13:43:36,046 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-12 13:43:36,670 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-12 13:43:44,572 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-12 13:44:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:44:21,143 INFO L93 Difference]: Finished difference Result 20165 states and 29682 transitions. [2020-10-12 13:44:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 13:44:21,149 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 266 [2020-10-12 13:44:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:44:21,258 INFO L225 Difference]: With dead ends: 20165 [2020-10-12 13:44:21,258 INFO L226 Difference]: Without dead ends: 20163 [2020-10-12 13:44:21,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 13:44:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20163 states. [2020-10-12 13:44:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20163 to 17664. [2020-10-12 13:44:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17664 states. [2020-10-12 13:44:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17664 states to 17664 states and 24053 transitions. [2020-10-12 13:44:21,913 INFO L78 Accepts]: Start accepts. Automaton has 17664 states and 24053 transitions. Word has length 266 [2020-10-12 13:44:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:44:21,914 INFO L479 AbstractCegarLoop]: Abstraction has 17664 states and 24053 transitions. [2020-10-12 13:44:21,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 13:44:21,914 INFO L276 IsEmpty]: Start isEmpty. Operand 17664 states and 24053 transitions. [2020-10-12 13:44:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-12 13:44:21,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:44:21,929 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:44:21,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 13:44:21,929 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:44:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:44:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1985468343, now seen corresponding path program 1 times [2020-10-12 13:44:21,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:44:21,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095712869] [2020-10-12 13:44:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:44:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:22,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:22,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:22,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:23,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking...