/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:49:30,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:49:30,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:49:30,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:49:30,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:49:30,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:49:30,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:49:30,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:49:30,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:49:30,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:49:30,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:49:30,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:49:30,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:49:30,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:49:30,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:49:30,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:49:30,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:49:30,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:49:30,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:49:30,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:49:30,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:49:30,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:49:30,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:49:30,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:49:30,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:49:30,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:49:30,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:49:30,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:49:30,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:49:30,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:49:30,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:49:30,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:49:30,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:49:30,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:49:30,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:49:30,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:49:30,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:49:30,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:49:30,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:49:30,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:49:30,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:49:30,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 07:49:30,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:49:30,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:49:30,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:49:30,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:49:30,321 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:49:30,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:49:30,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:49:30,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:49:30,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:49:30,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:49:30,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:49:30,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:49:30,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:49:30,324 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:49:30,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:49:30,324 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:49:30,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:49:30,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:49:30,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:49:30,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:49:30,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:49:30,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:49:30,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:49:30,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:49:30,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:49:30,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:49:30,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:49:30,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:49:30,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:49:30,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:49:30,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:49:30,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:49:30,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:49:30,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:49:30,823 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:49:30,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-25 07:49:30,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b40f8d2cd/34cd7191fdbe4bec92d5ca9f064666d6/FLAGc05c1032d [2020-09-25 07:49:31,496 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:49:31,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-25 07:49:31,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b40f8d2cd/34cd7191fdbe4bec92d5ca9f064666d6/FLAGc05c1032d [2020-09-25 07:49:31,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b40f8d2cd/34cd7191fdbe4bec92d5ca9f064666d6 [2020-09-25 07:49:31,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:49:31,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:49:31,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:49:31,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:49:31,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:49:31,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:49:31" (1/1) ... [2020-09-25 07:49:31,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44406637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:31, skipping insertion in model container [2020-09-25 07:49:31,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:49:31" (1/1) ... [2020-09-25 07:49:31,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:49:31,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:49:32,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:49:32,131 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:49:32,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:49:32,176 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:49:32,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32 WrapperNode [2020-09-25 07:49:32,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:49:32,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:49:32,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:49:32,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:49:32,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... [2020-09-25 07:49:32,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... [2020-09-25 07:49:32,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... [2020-09-25 07:49:32,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... [2020-09-25 07:49:32,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... [2020-09-25 07:49:32,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... [2020-09-25 07:49:32,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... [2020-09-25 07:49:32,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:49:32,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:49:32,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:49:32,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:49:32,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:49:32,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:49:32,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:49:32,405 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 07:49:32,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:49:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:49:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:49:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 07:49:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 07:49:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 07:49:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:49:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 07:49:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 07:49:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 07:49:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 07:49:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:49:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:49:32,801 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:49:32,801 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 07:49:32,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:49:32 BoogieIcfgContainer [2020-09-25 07:49:32,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:49:32,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:49:32,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:49:32,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:49:32,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:49:31" (1/3) ... [2020-09-25 07:49:32,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd944bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:49:32, skipping insertion in model container [2020-09-25 07:49:32,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:49:32" (2/3) ... [2020-09-25 07:49:32,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd944bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:49:32, skipping insertion in model container [2020-09-25 07:49:32,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:49:32" (3/3) ... [2020-09-25 07:49:32,817 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-25 07:49:32,828 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:49:32,840 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:49:32,864 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:49:32,896 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:49:32,896 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:49:32,896 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:49:32,896 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:49:32,896 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:49:32,896 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:49:32,897 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:49:32,897 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:49:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-09-25 07:49:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 07:49:32,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:32,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:49:32,932 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:32,940 INFO L82 PathProgramCache]: Analyzing trace with hash 144198137, now seen corresponding path program 1 times [2020-09-25 07:49:32,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:32,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704374400] [2020-09-25 07:49:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:33,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:33,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:33,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:33,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 07:49:33,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:49:33,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-09-25 07:49:33,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:33,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-25 07:49:33,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:33,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 07:49:33,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:49:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:33,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:33,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:33,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:49:33,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:33,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:49:33,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:33,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:33,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:33,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:49:33,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:33,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:33,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 07:49:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:33,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:33,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:49:33,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 07:49:33,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:33,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:49:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:33,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:49:33,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704374400] [2020-09-25 07:49:33,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:49:33,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 07:49:33,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76381954] [2020-09-25 07:49:33,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 07:49:33,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:49:33,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 07:49:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 07:49:33,608 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2020-09-25 07:49:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:49:33,803 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-09-25 07:49:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 07:49:33,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-09-25 07:49:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:49:33,819 INFO L225 Difference]: With dead ends: 124 [2020-09-25 07:49:33,819 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 07:49:33,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 07:49:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 07:49:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-25 07:49:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 07:49:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 07:49:33,881 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 44 [2020-09-25 07:49:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:49:33,881 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 07:49:33,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 07:49:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 07:49:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 07:49:33,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:33,884 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] [2020-09-25 07:49:33,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:49:33,885 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 608042528, now seen corresponding path program 1 times [2020-09-25 07:49:33,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:33,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107486628] [2020-09-25 07:49:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:33,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:35,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:35,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 07:49:35,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:49:35,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1137 [2020-09-25 07:49:35,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:35,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:35,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:49:35,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:49:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 07:49:35,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 07:49:35,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:49:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:35,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:35,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:35,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:49:35,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:35,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 07:49:35,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:35,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:35,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:49:35,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:35,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 07:49:35,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-25 07:49:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:35,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:35,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:35,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:49:35,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:35,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 07:49:35,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:35,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:49:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:35,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 07:49:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:49:35,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107486628] [2020-09-25 07:49:35,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:49:35,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:49:35,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610999754] [2020-09-25 07:49:35,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:49:35,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:49:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:49:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:49:35,199 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2020-09-25 07:49:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:49:35,443 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-09-25 07:49:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 07:49:35,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-25 07:49:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:49:35,449 INFO L225 Difference]: With dead ends: 104 [2020-09-25 07:49:35,449 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 07:49:35,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:49:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 07:49:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-09-25 07:49:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 07:49:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-25 07:49:35,477 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 46 [2020-09-25 07:49:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:49:35,478 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-25 07:49:35,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:49:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-25 07:49:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 07:49:35,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:35,481 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] [2020-09-25 07:49:35,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:49:35,481 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1644606330, now seen corresponding path program 1 times [2020-09-25 07:49:35,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:35,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213088894] [2020-09-25 07:49:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:35,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:37,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 07:49:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:49:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1658 [2020-09-25 07:49:37,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:37,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 07:49:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 07:49:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 07:49:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:37,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:49:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:37,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:37,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:37,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:49:37,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:37,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:49:37,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:37,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:37,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:37,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:49:37,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:37,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:37,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 07:49:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:37,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:37,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:37,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:49:37,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:37,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:49:37,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:37,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:37,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:37,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:49:37,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:37,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:49:37,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213088894] [2020-09-25 07:49:37,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:49:37,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 07:49:37,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766703990] [2020-09-25 07:49:37,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 07:49:37,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:49:37,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 07:49:37,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 07:49:37,433 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 9 states. [2020-09-25 07:49:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:49:37,820 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-25 07:49:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 07:49:37,821 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-09-25 07:49:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:49:37,822 INFO L225 Difference]: With dead ends: 82 [2020-09-25 07:49:37,823 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 07:49:37,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-25 07:49:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 07:49:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-25 07:49:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 07:49:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-25 07:49:37,831 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 56 [2020-09-25 07:49:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:49:37,832 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-25 07:49:37,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 07:49:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-25 07:49:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 07:49:37,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:37,834 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 07:49:37,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:49:37,835 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash -922277614, now seen corresponding path program 1 times [2020-09-25 07:49:37,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:37,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080640873] [2020-09-25 07:49:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:37,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:42,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:42,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 07:49:42,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:49:42,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 07:49:42,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:42,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:42,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:49:42,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:49:42,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 07:49:42,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:42,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:49:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:42,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:42,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:42,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:49:42,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:49:42,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:42,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:42,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:49:42,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:42,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 07:49:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:42,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:42,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:42,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:49:42,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:42,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:49:42,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:42,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:42,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:42,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:49:42,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:42,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:49:42,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080640873] [2020-09-25 07:49:42,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:49:42,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 07:49:42,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288562118] [2020-09-25 07:49:42,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 07:49:42,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:49:42,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 07:49:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:49:42,967 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 6 states. [2020-09-25 07:49:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:49:43,195 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-09-25 07:49:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 07:49:43,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-09-25 07:49:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:49:43,197 INFO L225 Difference]: With dead ends: 118 [2020-09-25 07:49:43,197 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 07:49:43,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 07:49:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 07:49:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-09-25 07:49:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 07:49:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-09-25 07:49:43,216 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 62 [2020-09-25 07:49:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:49:43,217 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-09-25 07:49:43,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 07:49:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-09-25 07:49:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 07:49:43,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:43,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:49:43,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:49:43,223 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:43,223 INFO L82 PathProgramCache]: Analyzing trace with hash -327292308, now seen corresponding path program 2 times [2020-09-25 07:49:43,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:43,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686250009] [2020-09-25 07:49:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:43,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:43,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:44,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:48,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:48,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 07:49:48,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:49:48,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 07:49:48,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:48,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:48,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:49:48,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:49:48,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 07:49:48,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:48,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:49:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:48,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:48,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:48,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:49:48,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:49:48,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:48,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:49:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:48,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:48,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 07:49:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:48,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:48,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:49:48,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:48,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:49:48,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:48,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:49:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:49:48,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686250009] [2020-09-25 07:49:48,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:49:48,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 07:49:48,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287665770] [2020-09-25 07:49:48,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 07:49:48,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:49:48,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 07:49:48,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 07:49:48,407 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 8 states. [2020-09-25 07:49:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:49:48,671 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-09-25 07:49:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 07:49:48,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-09-25 07:49:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:49:48,673 INFO L225 Difference]: With dead ends: 128 [2020-09-25 07:49:48,673 INFO L226 Difference]: Without dead ends: 91 [2020-09-25 07:49:48,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:49:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-25 07:49:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-09-25 07:49:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 07:49:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-09-25 07:49:48,689 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 72 [2020-09-25 07:49:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:49:48,690 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-09-25 07:49:48,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 07:49:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-09-25 07:49:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-25 07:49:48,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:48,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 07:49:48,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 07:49:48,695 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:48,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2006860614, now seen corresponding path program 3 times [2020-09-25 07:49:48,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:48,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903750006] [2020-09-25 07:49:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:48,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:48,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:51,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:53,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:53,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-25 07:49:53,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:49:53,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 07:49:53,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:53,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:53,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:49:53,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:49:53,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 07:49:53,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:53,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:49:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:53,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:53,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:53,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:49:53,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:53,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 07:49:53,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:53,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:53,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:53,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:49:53,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:53,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 07:49:53,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-25 07:49:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:53,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:53,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:53,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:49:53,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:53,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:49:53,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:53,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:53,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:49:53,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:53,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:49:53,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903750006] [2020-09-25 07:49:53,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:49:53,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 07:49:53,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679733893] [2020-09-25 07:49:53,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 07:49:53,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:49:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 07:49:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 07:49:53,903 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 10 states. [2020-09-25 07:49:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:49:54,176 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-09-25 07:49:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 07:49:54,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-09-25 07:49:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:49:54,178 INFO L225 Difference]: With dead ends: 138 [2020-09-25 07:49:54,178 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 07:49:54,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 07:49:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 07:49:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-09-25 07:49:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 07:49:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-09-25 07:49:54,198 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 82 [2020-09-25 07:49:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:49:54,199 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-09-25 07:49:54,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 07:49:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-09-25 07:49:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-25 07:49:54,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:54,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-09-25 07:49:54,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 07:49:54,203 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash 49337248, now seen corresponding path program 4 times [2020-09-25 07:49:54,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:54,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757106046] [2020-09-25 07:49:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:54,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:54,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:56,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-25 07:49:59,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:49:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 07:49:59,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:59,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:59,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 07:49:59,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:49:59,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 07:49:59,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:59,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:49:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:59,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:59,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:59,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:49:59,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:59,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:49:59,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:59,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:59,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:49:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:59,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:59,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-25 07:49:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:59,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:59,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:49:59,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:49:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:49:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:49:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:49:59,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:49:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:49:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:49:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:49:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:49:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:49:59,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757106046] [2020-09-25 07:49:59,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:49:59,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 07:49:59,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868336633] [2020-09-25 07:49:59,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 07:49:59,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:49:59,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 07:49:59,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:49:59,431 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 12 states. [2020-09-25 07:49:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:49:59,766 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2020-09-25 07:49:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 07:49:59,767 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 92 [2020-09-25 07:49:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:49:59,768 INFO L225 Difference]: With dead ends: 148 [2020-09-25 07:49:59,768 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 07:49:59,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 07:49:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 07:49:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-09-25 07:49:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-25 07:49:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-09-25 07:49:59,786 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 92 [2020-09-25 07:49:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:49:59,787 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-09-25 07:49:59,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 07:49:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-09-25 07:49:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-25 07:49:59,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:49:59,791 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-09-25 07:49:59,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 07:49:59,792 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:49:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:49:59,792 INFO L82 PathProgramCache]: Analyzing trace with hash 213269370, now seen corresponding path program 5 times [2020-09-25 07:49:59,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:49:59,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227222476] [2020-09-25 07:49:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:49:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:49:59,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:49:59,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:02,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:04,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:04,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-09-25 07:50:04,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:50:04,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 07:50:04,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:04,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 07:50:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:50:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 07:50:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:50:04,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:04,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:04,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:04,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:04,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:50:04,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:04,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:04,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:04,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:04,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:04,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-25 07:50:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:04,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:05,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:05,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:50:05,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:05,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:50:05,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:05,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:50:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:05,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:50:05,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227222476] [2020-09-25 07:50:05,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:05,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 07:50:05,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140736937] [2020-09-25 07:50:05,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 07:50:05,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 07:50:05,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 07:50:05,031 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 14 states. [2020-09-25 07:50:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:05,343 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2020-09-25 07:50:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 07:50:05,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-09-25 07:50:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:05,345 INFO L225 Difference]: With dead ends: 158 [2020-09-25 07:50:05,345 INFO L226 Difference]: Without dead ends: 121 [2020-09-25 07:50:05,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 07:50:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-25 07:50:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2020-09-25 07:50:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 07:50:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-09-25 07:50:05,357 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 102 [2020-09-25 07:50:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:05,357 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-09-25 07:50:05,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 07:50:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-09-25 07:50:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-25 07:50:05,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:05,360 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-09-25 07:50:05,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 07:50:05,361 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash 854006484, now seen corresponding path program 6 times [2020-09-25 07:50:05,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:05,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616245439] [2020-09-25 07:50:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:05,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:05,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:10,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:10,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-25 07:50:10,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:50:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 07:50:10,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:10,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:10,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 07:50:10,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:50:10,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 07:50:10,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:10,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:10,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:10,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:10,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:50:10,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:10,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:10,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:10,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-25 07:50:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:10,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:10,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:10,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:50:10,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:10,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:50:10,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:10,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:50:10,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:10,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:50:10,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616245439] [2020-09-25 07:50:10,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:10,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 07:50:10,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759143514] [2020-09-25 07:50:10,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 07:50:10,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 07:50:10,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 07:50:10,616 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 16 states. [2020-09-25 07:50:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:11,175 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-09-25 07:50:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 07:50:11,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-09-25 07:50:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:11,177 INFO L225 Difference]: With dead ends: 168 [2020-09-25 07:50:11,177 INFO L226 Difference]: Without dead ends: 131 [2020-09-25 07:50:11,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-25 07:50:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-25 07:50:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2020-09-25 07:50:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-25 07:50:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-09-25 07:50:11,194 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 112 [2020-09-25 07:50:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:11,195 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-09-25 07:50:11,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 07:50:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-09-25 07:50:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-25 07:50:11,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:11,200 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-09-25 07:50:11,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 07:50:11,200 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash -315354706, now seen corresponding path program 7 times [2020-09-25 07:50:11,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:11,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888251805] [2020-09-25 07:50:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:15,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:16,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:16,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-25 07:50:16,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:50:16,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 07:50:16,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:16,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:50:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-09-25 07:50:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 07:50:16,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:50:16,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:16,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:16,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:16,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:16,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:16,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:50:16,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:16,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:16,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:16,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:16,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:16,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-25 07:50:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:16,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:16,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 07:50:16,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:16,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:50:16,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:16,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 07:50:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-09-25 07:50:16,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888251805] [2020-09-25 07:50:16,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:16,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 07:50:16,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847695846] [2020-09-25 07:50:16,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 07:50:16,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:16,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 07:50:16,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 07:50:16,461 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 10 states. [2020-09-25 07:50:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:16,808 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2020-09-25 07:50:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 07:50:16,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 122 [2020-09-25 07:50:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:16,810 INFO L225 Difference]: With dead ends: 148 [2020-09-25 07:50:16,810 INFO L226 Difference]: Without dead ends: 132 [2020-09-25 07:50:16,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-25 07:50:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-25 07:50:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-09-25 07:50:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-25 07:50:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-09-25 07:50:16,816 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 122 [2020-09-25 07:50:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:16,816 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-09-25 07:50:16,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 07:50:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-09-25 07:50:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-25 07:50:16,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:16,818 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 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] [2020-09-25 07:50:16,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 07:50:16,819 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash -956690362, now seen corresponding path program 8 times [2020-09-25 07:50:16,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:16,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393141558] [2020-09-25 07:50:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:16,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking...