/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:22:42,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:22:42,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:22:42,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:22:42,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:22:42,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:22:42,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:22:42,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:22:42,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:22:42,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:22:42,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:22:42,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:22:42,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:22:42,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:22:42,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:22:42,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:22:42,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:22:42,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:22:42,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:22:42,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:22:42,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:22:42,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:22:42,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:22:42,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:22:42,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:22:42,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:22:42,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:22:42,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:22:42,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:22:42,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:22:42,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:22:42,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:22:42,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:22:42,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:22:42,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:22:42,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:22:42,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:22:42,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:22:42,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:22:42,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:22:42,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:22:42,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 12:22:42,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:22:42,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:22:42,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:22:42,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:22:42,298 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:22:42,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:22:42,299 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:22:42,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:22:42,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:22:42,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:22:42,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:22:42,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:22:42,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:22:42,301 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:22:42,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:22:42,302 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:22:42,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:22:42,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:22:42,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:22:42,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:22:42,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:22:42,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:22:42,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:22:42,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:22:42,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:22:42,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:22:42,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:22:42,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:22:42,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:22:42,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:22:42,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:22:42,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:22:42,776 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:22:42,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:22:42,779 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:22:42,780 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-25 12:22:42,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd4bb1f41/3a5a7e2d1b27454d8242da1c6f1e8095/FLAGccf744fc7 [2020-09-25 12:22:43,540 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:22:43,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-25 12:22:43,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd4bb1f41/3a5a7e2d1b27454d8242da1c6f1e8095/FLAGccf744fc7 [2020-09-25 12:22:43,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd4bb1f41/3a5a7e2d1b27454d8242da1c6f1e8095 [2020-09-25 12:22:43,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:22:43,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:22:43,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:22:43,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:22:43,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:22:43,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:22:43" (1/1) ... [2020-09-25 12:22:43,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f88baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:43, skipping insertion in model container [2020-09-25 12:22:43,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:22:43" (1/1) ... [2020-09-25 12:22:43,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:22:43,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:22:44,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:22:44,340 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:22:44,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:22:44,595 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:22:44,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44 WrapperNode [2020-09-25 12:22:44,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:22:44,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:22:44,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:22:44,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:22:44,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... [2020-09-25 12:22:44,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... [2020-09-25 12:22:44,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... [2020-09-25 12:22:44,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... [2020-09-25 12:22:44,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... [2020-09-25 12:22:44,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... [2020-09-25 12:22:44,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... [2020-09-25 12:22:44,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:22:44,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:22:44,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:22:44,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:22:44,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:22:44,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:22:44,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:22:44,843 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 12:22:44,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:22:44,844 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 12:22:44,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:22:44,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:22:44,844 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:22:44,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:22:44,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:22:44,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:22:46,207 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:22:46,208 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:22:46,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:22:46 BoogieIcfgContainer [2020-09-25 12:22:46,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:22:46,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:22:46,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:22:46,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:22:46,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:22:43" (1/3) ... [2020-09-25 12:22:46,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3e8400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:22:46, skipping insertion in model container [2020-09-25 12:22:46,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:22:44" (2/3) ... [2020-09-25 12:22:46,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3e8400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:22:46, skipping insertion in model container [2020-09-25 12:22:46,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:22:46" (3/3) ... [2020-09-25 12:22:46,229 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2020-09-25 12:22:46,241 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:22:46,253 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:22:46,278 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:22:46,316 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:22:46,316 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:22:46,317 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:22:46,317 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:22:46,317 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:22:46,317 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:22:46,317 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:22:46,318 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:22:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 12:22:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 12:22:46,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:46,375 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] [2020-09-25 12:22:46,376 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash 602782831, now seen corresponding path program 1 times [2020-09-25 12:22:46,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:46,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392342298] [2020-09-25 12:22:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:46,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:47,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:49,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:49,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:51,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:51,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 12:22:51,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:22:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 12:22:51,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:51,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:51,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:22:51,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 12:22:51,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-25 12:22:51,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 12:22:51,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:51,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:51,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:51,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:51,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:51,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 12:22:51,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:51,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:51,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:51,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:51,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 12:22:51,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:22:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:51,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392342298] [2020-09-25 12:22:51,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:22:51,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:22:51,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809634578] [2020-09-25 12:22:52,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:22:52,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:52,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:22:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:22:52,029 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 12:22:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:54,319 INFO L93 Difference]: Finished difference Result 1212 states and 1611 transitions. [2020-09-25 12:22:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:22:54,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-09-25 12:22:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:54,349 INFO L225 Difference]: With dead ends: 1212 [2020-09-25 12:22:54,349 INFO L226 Difference]: Without dead ends: 638 [2020-09-25 12:22:54,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:22:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-25 12:22:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 603. [2020-09-25 12:22:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 12:22:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 12:22:54,474 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 104 [2020-09-25 12:22:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:54,475 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 12:22:54,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:22:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 12:22:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-25 12:22:54,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:54,484 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:22:54,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:22:54,485 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1195739072, now seen corresponding path program 1 times [2020-09-25 12:22:54,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:54,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918284870] [2020-09-25 12:22:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:54,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:54,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:55,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:55,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:57,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:57,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-25 12:22:57,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:22:57,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2785 [2020-09-25 12:22:57,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:57,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:22:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 12:22:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 12:22:57,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 12:22:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:22:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:57,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:57,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:57,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:22:57,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:22:57,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:57,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:22:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:22:57,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:22:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:57,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:57,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:22:57,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 12:22:57,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:22:57,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 12:22:57,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:22:57,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:22:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:22:57,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:22:57,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 12:22:57,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:22:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:22:57,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918284870] [2020-09-25 12:22:57,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:22:57,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:22:57,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482251250] [2020-09-25 12:22:57,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:22:57,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:22:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:22:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:22:57,596 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 5 states. [2020-09-25 12:22:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:22:59,566 INFO L93 Difference]: Finished difference Result 1559 states and 1931 transitions. [2020-09-25 12:22:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:22:59,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-09-25 12:22:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:22:59,575 INFO L225 Difference]: With dead ends: 1559 [2020-09-25 12:22:59,575 INFO L226 Difference]: Without dead ends: 980 [2020-09-25 12:22:59,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:22:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-09-25 12:22:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 889. [2020-09-25 12:22:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-09-25 12:22:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1094 transitions. [2020-09-25 12:22:59,620 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1094 transitions. Word has length 125 [2020-09-25 12:22:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:22:59,621 INFO L479 AbstractCegarLoop]: Abstraction has 889 states and 1094 transitions. [2020-09-25 12:22:59,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:22:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1094 transitions. [2020-09-25 12:22:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-25 12:22:59,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:22:59,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:22:59,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:22:59,626 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:22:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:22:59,627 INFO L82 PathProgramCache]: Analyzing trace with hash 305762680, now seen corresponding path program 1 times [2020-09-25 12:22:59,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:22:59,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983032322] [2020-09-25 12:22:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:22:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:22:59,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:59,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:22:59,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:00,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:00,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:00,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:00,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:00,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:04,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:04,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-25 12:23:04,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:23:04,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-25 12:23:04,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:04,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:23:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 12:23:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 12:23:04,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:04,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:04,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:04,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:04,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:23:04,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 12:23:04,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:04,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:04,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:04,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:04,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:04,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:04,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:23:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:04,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:04,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:04,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 12:23:04,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:04,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 12:23:04,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:04,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:04,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:23:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 12:23:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:23:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:23:05,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983032322] [2020-09-25 12:23:05,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:23:05,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:23:05,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137757275] [2020-09-25 12:23:05,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:23:05,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:23:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:23:05,052 INFO L87 Difference]: Start difference. First operand 889 states and 1094 transitions. Second operand 5 states. [2020-09-25 12:23:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:06,990 INFO L93 Difference]: Finished difference Result 2372 states and 3027 transitions. [2020-09-25 12:23:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:23:06,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-09-25 12:23:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:07,001 INFO L225 Difference]: With dead ends: 2372 [2020-09-25 12:23:07,001 INFO L226 Difference]: Without dead ends: 1507 [2020-09-25 12:23:07,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:23:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-09-25 12:23:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1461. [2020-09-25 12:23:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2020-09-25 12:23:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1822 transitions. [2020-09-25 12:23:07,081 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1822 transitions. Word has length 134 [2020-09-25 12:23:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:07,083 INFO L479 AbstractCegarLoop]: Abstraction has 1461 states and 1822 transitions. [2020-09-25 12:23:07,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:23:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1822 transitions. [2020-09-25 12:23:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 12:23:07,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:07,096 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:23:07,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:23:07,097 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:07,106 INFO L82 PathProgramCache]: Analyzing trace with hash -588171755, now seen corresponding path program 1 times [2020-09-25 12:23:07,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:07,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543525435] [2020-09-25 12:23:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:07,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:07,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:07,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:09,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:09,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-09-25 12:23:09,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:23:09,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1914 [2020-09-25 12:23:09,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:09,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:09,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:23:09,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 12:23:09,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 12:23:09,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:23:09,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:09,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:09,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:23:09,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:09,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 12:23:09,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:09,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:09,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:09,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:09,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:09,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:09,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:23:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:09,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:09,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:09,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 12:23:09,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:09,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 12:23:09,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:09,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:23:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:23:09,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:09,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 12:23:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:09,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:09,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 12:23:09,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:09,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-09-25 12:23:09,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:09,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:09,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:23:09,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 12:23:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 12:23:09,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 12:23:09,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543525435] [2020-09-25 12:23:09,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:23:09,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:23:09,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766204012] [2020-09-25 12:23:09,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:23:09,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:23:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:23:09,536 INFO L87 Difference]: Start difference. First operand 1461 states and 1822 transitions. Second operand 7 states. [2020-09-25 12:23:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:11,987 INFO L93 Difference]: Finished difference Result 3190 states and 4142 transitions. [2020-09-25 12:23:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:23:11,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-09-25 12:23:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:12,008 INFO L225 Difference]: With dead ends: 3190 [2020-09-25 12:23:12,008 INFO L226 Difference]: Without dead ends: 1894 [2020-09-25 12:23:12,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:23:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-09-25 12:23:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1763. [2020-09-25 12:23:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2020-09-25 12:23:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2225 transitions. [2020-09-25 12:23:12,130 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2225 transitions. Word has length 181 [2020-09-25 12:23:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:12,131 INFO L479 AbstractCegarLoop]: Abstraction has 1763 states and 2225 transitions. [2020-09-25 12:23:12,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:23:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2225 transitions. [2020-09-25 12:23:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-25 12:23:12,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:12,145 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:23:12,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:23:12,146 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1738067261, now seen corresponding path program 1 times [2020-09-25 12:23:12,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:12,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928832974] [2020-09-25 12:23:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:12,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:12,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:15,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:16,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:17,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:17,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-09-25 12:23:17,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 12:23:17,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-09-25 12:23:17,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:17,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:17,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:23:17,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 12:23:17,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-09-25 12:23:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:17,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:17,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:17,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:23:17,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:17,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 12:23:17,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:17,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:17,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:17,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:17,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:23:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:17,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:17,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 12:23:17,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:17,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 12:23:17,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:17,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:17,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:23:17,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:17,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:23:17,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:17,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 12:23:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:17,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:17,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:17,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:17,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 12:23:17,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:23:17,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-09-25 12:23:17,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:17,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:23:17,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:17,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 12:23:17,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 12:23:17,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928832974] [2020-09-25 12:23:17,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:23:17,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:23:17,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008100142] [2020-09-25 12:23:17,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:23:17,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:23:17,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:23:17,748 INFO L87 Difference]: Start difference. First operand 1763 states and 2225 transitions. Second operand 5 states. [2020-09-25 12:23:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:19,831 INFO L93 Difference]: Finished difference Result 3954 states and 5167 transitions. [2020-09-25 12:23:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:23:19,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-09-25 12:23:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:19,848 INFO L225 Difference]: With dead ends: 3954 [2020-09-25 12:23:19,848 INFO L226 Difference]: Without dead ends: 2356 [2020-09-25 12:23:19,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 12:23:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2020-09-25 12:23:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1906. [2020-09-25 12:23:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1906 states. [2020-09-25 12:23:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2338 transitions. [2020-09-25 12:23:19,938 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2338 transitions. Word has length 182 [2020-09-25 12:23:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:19,939 INFO L479 AbstractCegarLoop]: Abstraction has 1906 states and 2338 transitions. [2020-09-25 12:23:19,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:23:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2338 transitions. [2020-09-25 12:23:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-25 12:23:19,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:19,949 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, 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] [2020-09-25 12:23:19,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:23:19,950 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash 262225070, now seen corresponding path program 1 times [2020-09-25 12:23:19,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:19,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718636474] [2020-09-25 12:23:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:20,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:20,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:20,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:20,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:21,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:24,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:24,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:24,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:24,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 12:23:24,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 12:23:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 12:23:24,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:24,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:23:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 12:23:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 12:23:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:25,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:25,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:25,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:25,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:23:25,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:25,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 12:23:25,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:25,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:25,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:25,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:23:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:25,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:25,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:25,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 12:23:25,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:25,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 12:23:25,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:25,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:23:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 12:23:25,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:25,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 12:23:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:25,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:25,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:25,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 12:23:25,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-25 12:23:25,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:25,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:25,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:23:25,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 12:23:25,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 12:23:25,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:23:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 12:23:25,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718636474] [2020-09-25 12:23:25,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:23:25,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:23:25,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125982415] [2020-09-25 12:23:25,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:23:25,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:23:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:23:25,358 INFO L87 Difference]: Start difference. First operand 1906 states and 2338 transitions. Second operand 7 states. [2020-09-25 12:23:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:28,153 INFO L93 Difference]: Finished difference Result 4930 states and 6484 transitions. [2020-09-25 12:23:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:23:28,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 185 [2020-09-25 12:23:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:28,175 INFO L225 Difference]: With dead ends: 4930 [2020-09-25 12:23:28,176 INFO L226 Difference]: Without dead ends: 3189 [2020-09-25 12:23:28,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:23:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2020-09-25 12:23:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2778. [2020-09-25 12:23:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2778 states. [2020-09-25 12:23:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 3426 transitions. [2020-09-25 12:23:28,278 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 3426 transitions. Word has length 185 [2020-09-25 12:23:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:28,279 INFO L479 AbstractCegarLoop]: Abstraction has 2778 states and 3426 transitions. [2020-09-25 12:23:28,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:23:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 3426 transitions. [2020-09-25 12:23:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-09-25 12:23:28,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:28,291 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:23:28,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:23:28,291 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1707194346, now seen corresponding path program 1 times [2020-09-25 12:23:28,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:28,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909341492] [2020-09-25 12:23:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:28,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:28,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:28,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:29,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:29,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking...