/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=NARROWEST --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/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:29:00,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:29:00,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:29:00,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:29:00,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:29:00,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:29:00,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:29:00,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:29:00,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:29:00,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:29:00,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:29:00,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:29:00,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:29:00,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:29:00,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:29:00,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:29:00,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:29:00,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:29:00,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:29:00,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:29:00,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:29:00,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:29:00,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:29:00,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:29:00,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:29:00,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:29:00,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:29:00,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:29:00,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:29:00,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:29:00,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:29:00,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:29:00,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:29:00,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:29:00,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:29:00,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:29:00,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:29:00,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:29:00,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:29:00,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:29:00,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:29:00,125 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 [2020-10-13 10:29:00,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:29:00,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:29:00,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:29:00,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:29:00,179 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:29:00,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:29:00,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:29:00,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:29:00,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:29:00,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:29:00,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:29:00,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:29:00,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:29:00,183 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:29:00,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:29:00,183 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:29:00,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:29:00,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:29:00,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:29:00,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:29:00,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:29:00,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:29:00,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:29:00,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:29:00,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:29:00,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:29:00,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:29:00,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:29:00,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:29:00,186 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:29:00,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:29:00,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:29:00,564 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:29:00,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:29:00,568 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:29:00,569 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-10-13 10:29:00,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3eb749528/bc5f90d01eff439daccac47f3961aca9/FLAG9c90e4744 [2020-10-13 10:29:01,249 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:29:01,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-10-13 10:29:01,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3eb749528/bc5f90d01eff439daccac47f3961aca9/FLAG9c90e4744 [2020-10-13 10:29:01,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3eb749528/bc5f90d01eff439daccac47f3961aca9 [2020-10-13 10:29:01,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:29:01,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:29:01,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:29:01,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:29:01,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:29:01,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:29:01" (1/1) ... [2020-10-13 10:29:01,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc1a58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:01, skipping insertion in model container [2020-10-13 10:29:01,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:29:01" (1/1) ... [2020-10-13 10:29:01,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:29:01,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:29:02,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:29:02,151 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:29:02,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:29:02,294 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:29:02,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02 WrapperNode [2020-10-13 10:29:02,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:29:02,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:29:02,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:29:02,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:29:02,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (1/1) ... [2020-10-13 10:29:02,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (1/1) ... [2020-10-13 10:29:02,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (1/1) ... [2020-10-13 10:29:02,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (1/1) ... [2020-10-13 10:29:02,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (1/1) ... [2020-10-13 10:29:02,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (1/1) ... [2020-10-13 10:29:02,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (1/1) ... [2020-10-13 10:29:02,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:29:02,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:29:02,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:29:02,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:29:02,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (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 [2020-10-13 10:29:02,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:29:02,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:29:02,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:29:02,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:29:02,454 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-13 10:29:02,455 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-10-13 10:29:02,455 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-10-13 10:29:02,455 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-10-13 10:29:02,455 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-10-13 10:29:02,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-10-13 10:29:02,456 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-10-13 10:29:02,456 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-10-13 10:29:02,456 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-10-13 10:29:02,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:29:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:29:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:29:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:29:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:29:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:29:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:29:02,457 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:29:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:29:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:29:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:29:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:29:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:29:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:29:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:29:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:29:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:29:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:29:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:29:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:29:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:29:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:29:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:29:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:29:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:29:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:29:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:29:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:29:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:29:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:29:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:29:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:29:02,462 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:29:02,462 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:29:02,462 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:29:02,462 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:29:02,462 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:29:02,462 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:29:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:29:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:29:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:29:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:29:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:29:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:29:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:29:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:29:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:29:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:29:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:29:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:29:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:29:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:29:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:29:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:29:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:29:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:29:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:29:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:29:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:29:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:29:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:29:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:29:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:29:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:29:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:29:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:29:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:29:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:29:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:29:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:29:02,468 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:29:02,468 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:29:02,468 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:29:02,468 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:29:02,468 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:29:02,468 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:29:02,469 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:29:02,469 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:29:02,469 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:29:02,469 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:29:02,469 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:29:02,469 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:29:02,469 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:29:02,470 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:29:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:29:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:29:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:29:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:29:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:29:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:29:02,471 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:29:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:29:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:29:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:29:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:29:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:29:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:29:02,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:29:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-13 10:29:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-10-13 10:29:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:29:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:29:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-10-13 10:29:02,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:29:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-10-13 10:29:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:29:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-13 10:29:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:29:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-10-13 10:29:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-10-13 10:29:02,474 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-10-13 10:29:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-10-13 10:29:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-10-13 10:29:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:29:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:29:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:29:03,250 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:29:03,250 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-10-13 10:29:03,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:29:03 BoogieIcfgContainer [2020-10-13 10:29:03,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:29:03,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:29:03,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:29:03,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:29:03,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:29:01" (1/3) ... [2020-10-13 10:29:03,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405912d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:29:03, skipping insertion in model container [2020-10-13 10:29:03,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:29:02" (2/3) ... [2020-10-13 10:29:03,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405912d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:29:03, skipping insertion in model container [2020-10-13 10:29:03,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:29:03" (3/3) ... [2020-10-13 10:29:03,266 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-10-13 10:29:03,278 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:29:03,287 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:29:03,300 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:29:03,324 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:29:03,324 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:29:03,324 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:29:03,324 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:29:03,325 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:29:03,325 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:29:03,325 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:29:03,325 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:29:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-10-13 10:29:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:29:03,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:03,359 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] [2020-10-13 10:29:03,359 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1243342133, now seen corresponding path program 1 times [2020-10-13 10:29:03,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:03,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393677438] [2020-10-13 10:29:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:03,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:03,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:29:03,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:29:03,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-13 10:29:03,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:29:03,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:03,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:29:03,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:03,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:03,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:03,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:03,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:03,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:29:03,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:03,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:03,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:03,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:03,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:04,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:29:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:04,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:04,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:04,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:04,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 10:29:04,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:29:04,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 10:29:04,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 10:29:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:04,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:29:04,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393677438] [2020-10-13 10:29:04,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:29:04,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:29:04,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181332742] [2020-10-13 10:29:04,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:29:04,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:29:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:29:04,160 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-10-13 10:29:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:04,520 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2020-10-13 10:29:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:29:04,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-13 10:29:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:04,538 INFO L225 Difference]: With dead ends: 234 [2020-10-13 10:29:04,538 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:29:04,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:29:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:29:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2020-10-13 10:29:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:29:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-10-13 10:29:04,604 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 24 [2020-10-13 10:29:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:04,605 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-10-13 10:29:04,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:29:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-10-13 10:29:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:29:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:04,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:29:04,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:29:04,610 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2076611886, now seen corresponding path program 1 times [2020-10-13 10:29:04,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:04,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916894264] [2020-10-13 10:29:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:04,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:06,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:09,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:09,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:29:09,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:29:09,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:29:09,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:09,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:29:09,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:29:09,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:29:09,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:29:09,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:09,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:09,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:09,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:29:09,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:09,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:29:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:09,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:11,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:11,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:29:11,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:11,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1193 [2020-10-13 10:29:11,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:11,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:29:11,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:11,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:29:11,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:29:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:11,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:11,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:11,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:11,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:29:11,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 10:29:11,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:29:11,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:11,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:29:11,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:29:11,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:29:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:11,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:11,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:11,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:29:11,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 10:29:11,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:11,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:29:11,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:11,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:29:11,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:11,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 10:29:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:11,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:11,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:11,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:29:11,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 10:29:11,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:29:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:29:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:29:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:14,998 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 178 DAG size of output: 110 [2020-10-13 10:29:15,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:29:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:15,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:15,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:15,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:29:15,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:15,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 10:29:15,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:15,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:29:15,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:29:15,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:29:15,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:15,391 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2020-10-13 10:29:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:29:15,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916894264] [2020-10-13 10:29:15,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:15,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:29:15,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651181132] [2020-10-13 10:29:15,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:29:15,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:29:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:29:15,450 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 24 states. [2020-10-13 10:29:16,859 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 10:29:18,077 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 10:29:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:24,108 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2020-10-13 10:29:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:29:24,109 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-13 10:29:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:24,113 INFO L225 Difference]: With dead ends: 160 [2020-10-13 10:29:24,113 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 10:29:24,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:29:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 10:29:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 120. [2020-10-13 10:29:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 10:29:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-10-13 10:29:24,139 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 49 [2020-10-13 10:29:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:24,140 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-10-13 10:29:24,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:29:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-10-13 10:29:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:29:24,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:24,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:29:24,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:29:24,142 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1536063324, now seen corresponding path program 1 times [2020-10-13 10:29:24,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:24,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286309997] [2020-10-13 10:29:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:24,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:24,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:24,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:25,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:29,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:29,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:29:29,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:29:29,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:29:29,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:29:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:29:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:29:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:29,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:29:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:29,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:29,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:29,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:29:29,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:29,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:29:29,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:29,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:29:29,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:29,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:29:29,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:29:29,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:29:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:29,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:29,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:30,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:30,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:29:30,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-10-13 10:29:30,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:29:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:29:30,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:30,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:29:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:30,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:30,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:30,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:29:30,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:29:30,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-13 10:29:30,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:30,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:29:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:29:30,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:30,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:29:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:30,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:30,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:30,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:29:30,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:30,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:29:30,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:29:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:29:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:29:30,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:29:30,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 10:29:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:30,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:30,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:29:30,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:30,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 10:29:30,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:30,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:29:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:29:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:29:30,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:29:33,820 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 178 DAG size of output: 110 [2020-10-13 10:29:33,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:29:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:29:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:29:33,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:29:33,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:29:33,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:29:33,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 10:29:33,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:29:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:29:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:29:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:29:33,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:29:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:29:34,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286309997] [2020-10-13 10:29:34,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:29:34,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:29:34,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314279420] [2020-10-13 10:29:34,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:29:34,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:29:34,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:29:34,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:29:34,161 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 24 states. [2020-10-13 10:29:35,601 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-13 10:29:36,867 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-13 10:29:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:29:44,194 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2020-10-13 10:29:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:29:44,195 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-10-13 10:29:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:29:44,198 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:29:44,198 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 10:29:44,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:29:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 10:29:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2020-10-13 10:29:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 10:29:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-10-13 10:29:44,222 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 51 [2020-10-13 10:29:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:29:44,223 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-10-13 10:29:44,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:29:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-10-13 10:29:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:29:44,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:29:44,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:29:44,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:29:44,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:29:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:29:44,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1614179064, now seen corresponding path program 1 times [2020-10-13 10:29:44,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:29:44,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022201576] [2020-10-13 10:29:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:29:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:29:44,250 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:29:44,250 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:29:44,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:29:44,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:29:44 BoogieIcfgContainer [2020-10-13 10:29:44,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:29:44,278 INFO L168 Benchmark]: Toolchain (without parser) took 42733.16 ms. Allocated memory was 140.0 MB in the beginning and 684.7 MB in the end (delta: 544.7 MB). Free memory was 101.8 MB in the beginning and 175.3 MB in the end (delta: -73.5 MB). Peak memory consumption was 471.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:29:44,279 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 10:29:44,280 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.16 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 101.5 MB in the beginning and 165.9 MB in the end (delta: -64.4 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:29:44,281 INFO L168 Benchmark]: Boogie Preprocessor took 86.16 ms. Allocated memory is still 201.3 MB. Free memory was 165.9 MB in the beginning and 162.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:29:44,281 INFO L168 Benchmark]: RCFGBuilder took 873.81 ms. Allocated memory is still 201.3 MB. Free memory was 162.0 MB in the beginning and 98.4 MB in the end (delta: 63.6 MB). Peak memory consumption was 63.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:29:44,282 INFO L168 Benchmark]: TraceAbstraction took 41018.39 ms. Allocated memory was 201.3 MB in the beginning and 684.7 MB in the end (delta: 483.4 MB). Free memory was 97.8 MB in the beginning and 175.3 MB in the end (delta: -77.5 MB). Peak memory consumption was 405.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:29:44,286 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 749.16 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 101.5 MB in the beginning and 165.9 MB in the end (delta: -64.4 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.16 ms. Allocated memory is still 201.3 MB. Free memory was 165.9 MB in the beginning and 162.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 873.81 ms. Allocated memory is still 201.3 MB. Free memory was 162.0 MB in the beginning and 98.4 MB in the end (delta: 63.6 MB). Peak memory consumption was 63.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 41018.39 ms. Allocated memory was 201.3 MB in the beginning and 684.7 MB in the end (delta: 483.4 MB). Free memory was 97.8 MB in the beginning and 175.3 MB in the end (delta: -77.5 MB). Peak memory consumption was 405.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L628] const struct node *p1, *p2; [L629] CALL, EXPR create_sll(&p1, &p2) [L577] struct node *list = ((void *)0); [L579] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L579] RET chain_node(&list) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L581] EXPR \read(*list) [L581] *pp2 = list [L582] COND FALSE !(__VERIFIER_nondet_int()) [L584] EXPR \read(*list) [L584] *pp1 = list [L586] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L586] RET chain_node(&list) [L587] COND FALSE !(__VERIFIER_nondet_int()) [L588] EXPR \read(*list) [L588] return list; [L577] struct node *list = ((void *)0); [L588] return list; [L629] RET, EXPR create_sll(&p1, &p2) [L629] struct node *list = create_sll(&p1, &p2); [L631] EXPR \read(*p1) [L631] EXPR \read(*p2) [L631] CALL check_seq_next(p1, p2) [L615] COND FALSE !(!(beg)) [L616] COND FALSE !(!(end)) [L617] EXPR beg->next [L617] beg = beg->next [L617] COND TRUE end != beg [L618] COND TRUE !(beg) [L618] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 40.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 19.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 313 SDtfs, 607 SDslu, 1386 SDs, 0 SdLazy, 3452 SolverSat, 357 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 12.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 85 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 21.3s InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 440708 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 12/20 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...