/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:45:49,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:45:49,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:45:49,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:45:49,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:45:49,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:45:49,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:45:49,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:45:49,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:45:49,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:45:49,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:45:49,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:45:49,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:45:49,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:45:49,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:45:49,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:45:49,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:45:49,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:45:49,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:45:49,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:45:49,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:45:49,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:45:49,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:45:49,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:45:49,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:45:49,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:45:49,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:45:49,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:45:49,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:45:49,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:45:49,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:45:49,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:45:49,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:45:49,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:45:49,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:45:49,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:45:49,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:45:49,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:45:49,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:45:49,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:45:49,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:45:49,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:45:49,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:45:49,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:45:49,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:45:49,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:45:49,243 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:45:49,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:45:49,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:45:49,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:45:49,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:45:49,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:45:49,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:45:49,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:45:49,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:45:49,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:45:49,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:45:49,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:45:49,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:45:49,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:45:49,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:45:49,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:45:49,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:45:49,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:45:49,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:45:49,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:45:49,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:45:49,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:45:49,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:45:49,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:45:49,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:45:49,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:45:49,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:45:49,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:45:49,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:45:49,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:45:49,565 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:45:49,566 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-10-12 15:45:49,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57afccca4/311d63c4f57640ef872559fc7840acaa/FLAG6f33b1142 [2020-10-12 15:45:50,214 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:45:50,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-10-12 15:45:50,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57afccca4/311d63c4f57640ef872559fc7840acaa/FLAG6f33b1142 [2020-10-12 15:45:50,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57afccca4/311d63c4f57640ef872559fc7840acaa [2020-10-12 15:45:50,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:45:50,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:45:50,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:45:50,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:45:50,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:45:50,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:45:50" (1/1) ... [2020-10-12 15:45:50,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cacc4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:50, skipping insertion in model container [2020-10-12 15:45:50,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:45:50" (1/1) ... [2020-10-12 15:45:50,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:45:50,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:45:51,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:45:51,057 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:45:51,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:45:51,158 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:45:51,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51 WrapperNode [2020-10-12 15:45:51,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:45:51,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:45:51,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:45:51,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:45:51,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... [2020-10-12 15:45:51,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... [2020-10-12 15:45:51,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... [2020-10-12 15:45:51,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... [2020-10-12 15:45:51,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... [2020-10-12 15:45:51,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... [2020-10-12 15:45:51,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... [2020-10-12 15:45:51,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:45:51,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:45:51,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:45:51,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:45:51,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:45:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:45:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:45:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:45:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:45:51,311 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:45:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-12 15:45:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:45:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:45:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:45:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:45:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:45:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:45:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:45:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:45:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:45:51,315 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:45:51,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:45:51,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:45:51,315 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:45:51,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:45:51,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:45:51,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:45:51,316 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:45:51,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:45:51,317 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:45:51,317 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:45:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:45:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:45:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:45:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:45:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:45:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:45:51,318 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:45:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:45:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:45:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:45:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:45:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:45:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:45:51,319 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:45:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:45:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:45:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:45:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:45:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:45:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:45:51,320 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:45:51,321 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:45:51,321 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:45:51,321 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:45:51,321 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:45:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:45:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:45:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:45:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:45:51,322 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:45:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:45:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:45:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:45:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:45:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:45:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:45:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:45:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:45:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:45:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:45:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:45:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:45:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:45:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:45:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:45:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:45:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:45:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:45:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:45:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:45:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:45:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:45:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:45:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:45:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:45:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:45:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:45:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:45:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:45:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:45:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:45:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:45:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:45:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:45:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:45:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:45:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:45:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:45:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:45:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:45:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:45:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:45:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:45:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:45:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:45:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:45:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:45:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:45:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:45:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:45:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:45:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:45:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-12 15:45:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:45:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:45:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:45:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:45:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:45:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:45:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:45:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:45:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:45:51,673 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:45:51,927 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:45:51,928 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 15:45:51,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:45:51 BoogieIcfgContainer [2020-10-12 15:45:51,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:45:51,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:45:51,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:45:51,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:45:51,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:45:50" (1/3) ... [2020-10-12 15:45:51,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5160b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:45:51, skipping insertion in model container [2020-10-12 15:45:51,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:45:51" (2/3) ... [2020-10-12 15:45:51,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5160b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:45:51, skipping insertion in model container [2020-10-12 15:45:51,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:45:51" (3/3) ... [2020-10-12 15:45:51,941 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-10-12 15:45:51,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:45:51,959 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:45:51,971 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:45:51,996 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:45:51,996 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:45:51,996 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:45:51,997 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:45:51,997 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:45:51,997 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:45:51,998 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:45:51,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:45:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-12 15:45:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:45:52,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:52,024 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] [2020-10-12 15:45:52,025 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-10-12 15:45:52,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:52,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431847442] [2020-10-12 15:45:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:52,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:52,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:52,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:52,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:45:52,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:52,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-12 15:45:52,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:45:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:45:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:45:52,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:52,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:52,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:52,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:52,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:45:52,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:52,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:52,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:52,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:52,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:52,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:45:52,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:52,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 15:45:52,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:52,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:45:52,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:45:52,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:45:52,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:53,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431847442] [2020-10-12 15:45:53,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:45:53,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:45:53,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68851400] [2020-10-12 15:45:53,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:45:53,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:45:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:45:53,031 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-10-12 15:45:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:53,328 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-10-12 15:45:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:45:53,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-12 15:45:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:53,340 INFO L225 Difference]: With dead ends: 73 [2020-10-12 15:45:53,341 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 15:45:53,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:45:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 15:45:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-10-12 15:45:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 15:45:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-12 15:45:53,391 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-10-12 15:45:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:53,391 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-12 15:45:53,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:45:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-12 15:45:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:45:53,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:53,393 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] [2020-10-12 15:45:53,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:45:53,394 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-10-12 15:45:53,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:53,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819231739] [2020-10-12 15:45:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:53,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:53,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:45:53,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:45:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-12 15:45:53,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:45:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:45:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:53,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:53,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:53,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:53,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:53,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:53,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:53,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:53,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:53,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 15:45:53,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:53,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-12 15:45:53,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:45:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:45:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:45:53,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:54,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819231739] [2020-10-12 15:45:54,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:54,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:45:54,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749331442] [2020-10-12 15:45:54,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:45:54,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:45:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:45:54,012 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 8 states. [2020-10-12 15:45:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:54,285 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-10-12 15:45:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:45:54,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 15:45:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:54,287 INFO L225 Difference]: With dead ends: 63 [2020-10-12 15:45:54,287 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:45:54,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:45:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:45:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-12 15:45:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:45:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-12 15:45:54,297 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 27 [2020-10-12 15:45:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:54,298 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-12 15:45:54,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:45:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-12 15:45:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:45:54,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:54,300 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:45:54,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:45:54,301 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash -162688360, now seen corresponding path program 2 times [2020-10-12 15:45:54,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:54,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789140135] [2020-10-12 15:45:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:54,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:54,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:54,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:55,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:56,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:45:56,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:45:56,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2616 [2020-10-12 15:45:56,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:56,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:45:56,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:56,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:45:56,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:56,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:57,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:57,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:57,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:57,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:57,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:57,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:57,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:57,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:57,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:57,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:57,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:45:57,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-12 15:45:57,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:45:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:57,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:45:57,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:57,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789140135] [2020-10-12 15:45:57,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:57,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:45:57,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444299155] [2020-10-12 15:45:57,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:45:57,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:45:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:45:57,626 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 14 states. [2020-10-12 15:45:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:58,500 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-10-12 15:45:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:45:58,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:45:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:58,503 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:45:58,503 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 15:45:58,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:45:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 15:45:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2020-10-12 15:45:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 15:45:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-12 15:45:58,513 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 34 [2020-10-12 15:45:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:58,514 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-12 15:45:58,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:45:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-12 15:45:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:45:58,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:58,516 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:45:58,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:45:58,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash -160841318, now seen corresponding path program 1 times [2020-10-12 15:45:58,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:58,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737199298] [2020-10-12 15:45:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:58,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:58,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:45:58,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-12 15:45:58,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:45:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:45:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:45:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:58,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:58,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:58,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:45:58,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:58,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:59,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:45:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:59,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:59,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:45:59,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:59,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 15:45:59,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:45:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:45:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:45:59,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:59,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737199298] [2020-10-12 15:45:59,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:59,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:45:59,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037028439] [2020-10-12 15:45:59,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:45:59,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:45:59,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:45:59,304 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 9 states. [2020-10-12 15:45:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:59,648 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-10-12 15:45:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:45:59,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-12 15:45:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:59,650 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:45:59,650 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 15:45:59,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:45:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 15:45:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-10-12 15:45:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:45:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-10-12 15:45:59,660 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2020-10-12 15:45:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:59,660 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-10-12 15:45:59,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:45:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-10-12 15:45:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:45:59,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:59,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:59,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:45:59,662 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1920314351, now seen corresponding path program 2 times [2020-10-12 15:45:59,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:59,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568844932] [2020-10-12 15:45:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:59,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:00,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:46:00,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:00,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-12 15:46:00,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:46:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:46:00,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:00,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:00,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:00,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:00,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:00,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:00,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:00,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:00,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:00,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:00,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:00,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:46:00,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:00,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-12 15:46:00,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:00,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:46:00,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:46:00,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:46:00,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:00,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568844932] [2020-10-12 15:46:00,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:00,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:46:00,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387253979] [2020-10-12 15:46:00,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:46:00,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:00,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:46:00,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:46:00,952 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 10 states. [2020-10-12 15:46:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:01,217 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2020-10-12 15:46:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:46:01,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-12 15:46:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:01,218 INFO L225 Difference]: With dead ends: 83 [2020-10-12 15:46:01,219 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 15:46:01,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:46:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 15:46:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-10-12 15:46:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 15:46:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-12 15:46:01,238 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 41 [2020-10-12 15:46:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:01,238 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-12 15:46:01,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:46:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-12 15:46:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:46:01,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:01,240 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:01,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:46:01,242 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1261279238, now seen corresponding path program 3 times [2020-10-12 15:46:01,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:01,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620384919] [2020-10-12 15:46:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:01,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:01,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:02,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:02,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:46:02,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:02,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-12 15:46:02,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:02,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:46:02,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:02,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:02,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:02,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:02,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:02,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:02,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:02,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:02,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:02,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:02,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:02,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:02,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:02,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:02,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:02,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:46:02,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-12 15:46:02,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:46:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:46:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:02,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620384919] [2020-10-12 15:46:02,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:02,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:46:02,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999226579] [2020-10-12 15:46:02,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:46:02,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:46:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:46:02,998 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 11 states. [2020-10-12 15:46:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:03,399 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2020-10-12 15:46:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:46:03,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-12 15:46:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:03,402 INFO L225 Difference]: With dead ends: 90 [2020-10-12 15:46:03,402 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 15:46:03,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 15:46:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-12 15:46:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:46:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-12 15:46:03,422 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 48 [2020-10-12 15:46:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:03,423 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-12 15:46:03,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:46:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-12 15:46:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:46:03,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:03,427 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:03,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:46:03,428 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:03,431 INFO L82 PathProgramCache]: Analyzing trace with hash 647436687, now seen corresponding path program 4 times [2020-10-12 15:46:03,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:03,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981561925] [2020-10-12 15:46:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:03,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:03,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:03,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:46:03,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-12 15:46:03,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:46:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:46:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:03,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:03,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:03,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:03,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:03,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:03,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:46:03,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:03,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:03,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:03,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:03,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:04,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:04,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:46:04,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:04,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-12 15:46:04,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:04,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:46:04,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:46:04,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:46:04,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-12 15:46:04,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981561925] [2020-10-12 15:46:04,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:46:04,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 15:46:04,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267209206] [2020-10-12 15:46:04,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:46:04,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:04,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:46:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:46:04,049 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 5 states. [2020-10-12 15:46:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:04,246 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2020-10-12 15:46:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:46:04,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-10-12 15:46:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:04,249 INFO L225 Difference]: With dead ends: 118 [2020-10-12 15:46:04,249 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 15:46:04,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:46:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 15:46:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-12 15:46:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:46:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-12 15:46:04,269 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 55 [2020-10-12 15:46:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:04,269 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-12 15:46:04,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:46:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-12 15:46:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:46:04,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:04,274 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:04,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:46:04,275 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-10-12 15:46:04,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:04,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312492903] [2020-10-12 15:46:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:46:04,337 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:46:04,338 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:46:04,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:46:04,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:46:04 BoogieIcfgContainer [2020-10-12 15:46:04,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:46:04,382 INFO L168 Benchmark]: Toolchain (without parser) took 13851.36 ms. Allocated memory was 147.8 MB in the beginning and 426.8 MB in the end (delta: 278.9 MB). Free memory was 101.1 MB in the beginning and 156.5 MB in the end (delta: -55.3 MB). Peak memory consumption was 223.6 MB. Max. memory is 7.1 GB. [2020-10-12 15:46:04,387 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 15:46:04,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.31 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 100.7 MB in the beginning and 168.2 MB in the end (delta: -67.4 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-10-12 15:46:04,389 INFO L168 Benchmark]: Boogie Preprocessor took 68.31 ms. Allocated memory is still 203.9 MB. Free memory was 168.2 MB in the beginning and 165.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-10-12 15:46:04,390 INFO L168 Benchmark]: RCFGBuilder took 704.09 ms. Allocated memory is still 203.9 MB. Free memory was 165.7 MB in the beginning and 119.6 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-10-12 15:46:04,390 INFO L168 Benchmark]: TraceAbstraction took 12444.83 ms. Allocated memory was 203.9 MB in the beginning and 426.8 MB in the end (delta: 222.8 MB). Free memory was 118.9 MB in the beginning and 156.5 MB in the end (delta: -37.5 MB). Peak memory consumption was 185.3 MB. Max. memory is 7.1 GB. [2020-10-12 15:46:04,403 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 629.31 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 100.7 MB in the beginning and 168.2 MB in the end (delta: -67.4 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.31 ms. Allocated memory is still 203.9 MB. Free memory was 168.2 MB in the beginning and 165.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 704.09 ms. Allocated memory is still 203.9 MB. Free memory was 165.7 MB in the beginning and 119.6 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12444.83 ms. Allocated memory was 203.9 MB in the beginning and 426.8 MB in the end (delta: 222.8 MB). Free memory was 118.9 MB in the beginning and 156.5 MB in the end (delta: -37.5 MB). Peak memory consumption was 185.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L589] CALL, EXPR dll_create(len) [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] RET, EXPR dll_create(len) [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.3s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 316 SDslu, 1116 SDs, 0 SdLazy, 1069 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 52 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 314 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 252 ConstructedInterpolants, 0 QuantifiedInterpolants, 32858 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 77/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...