/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/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:20:35,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:20:35,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:20:35,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:20:35,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:20:35,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:20:35,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:20:35,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:20:35,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:20:35,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:20:35,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:20:35,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:20:35,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:20:35,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:20:35,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:20:35,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:20:35,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:20:35,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:20:35,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:20:35,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:20:35,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:20:35,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:20:35,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:20:35,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:20:35,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:20:35,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:20:35,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:20:35,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:20:35,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:20:35,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:20:35,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:20:35,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:20:35,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:20:35,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:20:35,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:20:35,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:20:35,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:20:35,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:20:35,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:20:35,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:20:35,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:20:35,238 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 16:20:35,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:20:35,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:20:35,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:20:35,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:20:35,263 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:20:35,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:20:35,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:20:35,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:20:35,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:20:35,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:20:35,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:20:35,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:20:35,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:20:35,267 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:20:35,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:20:35,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:20:35,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:20:35,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:20:35,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:20:35,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:20:35,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:20:35,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:20:35,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:20:35,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:20:35,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:20:35,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:20:35,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:20:35,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:20:35,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:20:35,273 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 16:20:35,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:20:35,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:20:35,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:20:35,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:20:35,594 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:20:35,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-12 16:20:35,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dad44ff9/7ceec565f2a445d8a03f6d6c7a0aa026/FLAGd9d3aa2fd [2020-10-12 16:20:36,124 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:20:36,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-12 16:20:36,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dad44ff9/7ceec565f2a445d8a03f6d6c7a0aa026/FLAGd9d3aa2fd [2020-10-12 16:20:36,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dad44ff9/7ceec565f2a445d8a03f6d6c7a0aa026 [2020-10-12 16:20:36,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:20:36,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:20:36,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:20:36,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:20:36,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:20:36,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f43d38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36, skipping insertion in model container [2020-10-12 16:20:36,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:20:36,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:20:36,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:20:36,748 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:20:36,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:20:36,792 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:20:36,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36 WrapperNode [2020-10-12 16:20:36,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:20:36,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:20:36,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:20:36,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:20:36,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (1/1) ... [2020-10-12 16:20:36,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:20:36,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:20:36,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:20:36,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:20:36,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (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 16:20:37,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:20:37,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:20:37,042 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:20:37,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:20:37,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:20:37,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:20:37,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:20:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:20:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:20:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:20:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:20:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:20:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:20:37,325 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:20:37,325 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:20:37,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:20:37 BoogieIcfgContainer [2020-10-12 16:20:37,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:20:37,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:20:37,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:20:37,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:20:37,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:20:36" (1/3) ... [2020-10-12 16:20:37,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e800a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:20:37, skipping insertion in model container [2020-10-12 16:20:37,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:20:36" (2/3) ... [2020-10-12 16:20:37,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e800a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:20:37, skipping insertion in model container [2020-10-12 16:20:37,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:20:37" (3/3) ... [2020-10-12 16:20:37,352 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-10-12 16:20:37,376 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:20:37,389 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:20:37,421 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:20:37,460 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:20:37,460 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:20:37,461 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:20:37,461 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:20:37,461 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:20:37,461 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:20:37,461 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:20:37,461 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:20:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-12 16:20:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:20:37,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:37,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:37,489 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash -684006215, now seen corresponding path program 1 times [2020-10-12 16:20:37,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:37,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879588368] [2020-10-12 16:20:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:37,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:38,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:38,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:20:38,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:38,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-12 16:20:38,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:20:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:20:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:20:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:20:38,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:38,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:38,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:38,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:38,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:20:38,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:38,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:20:38,449 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 16:20:38,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879588368] [2020-10-12 16:20:38,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:20:38,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 16:20:38,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023407869] [2020-10-12 16:20:38,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:20:38,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:20:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:20:38,482 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-10-12 16:20:47,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:47,460 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2020-10-12 16:20:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:20:47,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-12 16:20:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:47,472 INFO L225 Difference]: With dead ends: 74 [2020-10-12 16:20:47,473 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:20:47,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:20:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:20:47,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-10-12 16:20:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:20:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-12 16:20:47,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 14 [2020-10-12 16:20:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:47,534 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-12 16:20:47,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:20:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-12 16:20:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:20:47,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:47,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:47,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:20:47,536 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:47,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1109543218, now seen corresponding path program 1 times [2020-10-12 16:20:47,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:47,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125445249] [2020-10-12 16:20:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:47,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:48,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:20:48,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:20:48,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1153 [2020-10-12 16:20:48,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:48,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:20:48,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:20:48,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:20:48,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:20:48,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:48,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:48,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:48,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:48,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:48,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:48,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-12 16:20:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:48,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:48,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:48,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 16:20:48,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:48,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:20:48,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:20:48,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 16:20:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:48,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125445249] [2020-10-12 16:20:48,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:48,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:20:48,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682183742] [2020-10-12 16:20:48,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:20:48,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:48,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:20:48,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:20:48,954 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 8 states. [2020-10-12 16:20:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:51,368 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-10-12 16:20:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:20:51,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 16:20:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:51,375 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:20:51,375 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:20:51,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:20:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:20:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 16:20:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:20:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-10-12 16:20:51,401 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 22 [2020-10-12 16:20:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:51,402 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-10-12 16:20:51,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:20:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-10-12 16:20:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:20:51,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:51,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:51,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:20:51,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:51,408 INFO L82 PathProgramCache]: Analyzing trace with hash 508253581, now seen corresponding path program 1 times [2020-10-12 16:20:51,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:51,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98554058] [2020-10-12 16:20:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:51,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:59,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:20:59,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:20:59,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8008 [2020-10-12 16:20:59,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:59,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:20:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:20:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:20:59,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:20:59,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:59,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:20:59,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:59,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:59,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:59,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:20:59,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-12 16:20:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:59,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:59,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:59,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:59,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 16:20:59,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:20:59,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:20:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:59,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98554058] [2020-10-12 16:20:59,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:59,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:20:59,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908557776] [2020-10-12 16:20:59,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:20:59,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:20:59,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:20:59,723 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 8 states. [2020-10-12 16:21:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:04,265 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-12 16:21:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:21:04,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-12 16:21:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:04,269 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:21:04,269 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:21:04,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:21:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:21:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-12 16:21:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:21:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-10-12 16:21:04,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 24 [2020-10-12 16:21:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:04,289 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-10-12 16:21:04,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:21:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-10-12 16:21:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:21:04,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:04,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:04,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:21:04,293 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:04,294 INFO L82 PathProgramCache]: Analyzing trace with hash -4341181, now seen corresponding path program 1 times [2020-10-12 16:21:04,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:04,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755842125] [2020-10-12 16:21:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:04,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:04,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:21:28,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24243 [2020-10-12 16:21:28,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:21:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:21:28,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:21:28,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:28,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-12 16:21:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:28,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755842125] [2020-10-12 16:21:28,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:21:28,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:21:28,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254999775] [2020-10-12 16:21:28,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:21:28,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:21:28,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:21:28,848 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2020-10-12 16:21:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:43,637 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2020-10-12 16:21:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:21:43,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-12 16:21:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:43,639 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:21:43,639 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:21:43,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:21:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:21:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-12 16:21:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:21:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2020-10-12 16:21:43,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 28 [2020-10-12 16:21:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:43,669 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2020-10-12 16:21:43,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:21:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2020-10-12 16:21:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:21:43,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:43,671 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 16:21:43,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:21:43,672 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1506040685, now seen corresponding path program 1 times [2020-10-12 16:21:43,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:43,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058626674] [2020-10-12 16:21:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:43,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:43,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:03,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:03,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:23:03,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:03,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80199 [2020-10-12 16:23:03,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:03,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:23:03,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:23:03,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:23:03,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:05,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:05,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:05,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:23:05,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:05,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:05,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:05,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:05,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:05,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:05,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:05,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-12 16:23:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:05,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:05,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:23:05,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:05,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 16:23:05,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:05,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:23:05,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:05,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:23:05,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:05,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058626674] [2020-10-12 16:23:05,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:05,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:23:05,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78082052] [2020-10-12 16:23:05,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:23:05,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:05,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:23:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:23:05,888 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 8 states. [2020-10-12 16:23:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:12,528 INFO L93 Difference]: Finished difference Result 89 states and 122 transitions. [2020-10-12 16:23:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:23:12,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-12 16:23:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:12,530 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:23:12,530 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:23:12,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:23:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:23:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-12 16:23:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:23:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-12 16:23:12,541 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 29 [2020-10-12 16:23:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:12,542 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-12 16:23:12,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:23:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-12 16:23:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:23:12,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:12,543 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 16:23:12,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:23:12,543 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:12,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1563298987, now seen corresponding path program 1 times [2020-10-12 16:23:12,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:12,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085901241] [2020-10-12 16:23:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:12,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking...