/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:18:43,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:18:44,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:18:44,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:18:44,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:18:44,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:18:44,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:18:44,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:18:44,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:18:44,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:18:44,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:18:44,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:18:44,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:18:44,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:18:44,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:18:44,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:18:44,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:18:44,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:18:44,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:18:44,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:18:44,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:18:44,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:18:44,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:18:44,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:18:44,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:18:44,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:18:44,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:18:44,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:18:44,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:18:44,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:18:44,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:18:44,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:18:44,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:18:44,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:18:44,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:18:44,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:18:44,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:18:44,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:18:44,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:18:44,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:18:44,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:18:44,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 12:18:44,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:18:44,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:18:44,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:18:44,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:18:44,189 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:18:44,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:18:44,190 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:18:44,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:18:44,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:18:44,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:18:44,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:18:44,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:18:44,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:18:44,193 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:18:44,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:18:44,193 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:18:44,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:18:44,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:18:44,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:18:44,194 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:18:44,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:18:44,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:18:44,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:18:44,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:18:44,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:18:44,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:18:44,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:18:44,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:18:44,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:18:44,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:18:44,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:18:44,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:18:44,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:18:44,698 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:18:44,699 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:18:44,700 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 12:18:44,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93e451a43/f76a76d55e6947cba290862ad1f39fd1/FLAG7f6e98405 [2020-09-25 12:18:45,405 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:18:45,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 12:18:45,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93e451a43/f76a76d55e6947cba290862ad1f39fd1/FLAG7f6e98405 [2020-09-25 12:18:45,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93e451a43/f76a76d55e6947cba290862ad1f39fd1 [2020-09-25 12:18:45,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:18:45,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:18:45,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:18:45,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:18:45,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:18:45,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:45" (1/1) ... [2020-09-25 12:18:45,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@768abc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:45, skipping insertion in model container [2020-09-25 12:18:45,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:45" (1/1) ... [2020-09-25 12:18:45,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:18:45,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:18:46,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:18:46,278 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:18:46,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:18:46,391 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:18:46,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46 WrapperNode [2020-09-25 12:18:46,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:18:46,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:18:46,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:18:46,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:18:46,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... [2020-09-25 12:18:46,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... [2020-09-25 12:18:46,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... [2020-09-25 12:18:46,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... [2020-09-25 12:18:46,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... [2020-09-25 12:18:46,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... [2020-09-25 12:18:46,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... [2020-09-25 12:18:46,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:18:46,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:18:46,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:18:46,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:18:46,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 12:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 12:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-25 12:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-09-25 12:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-09-25 12:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-09-25 12:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-09-25 12:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-09-25 12:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-09-25 12:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-09-25 12:18:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-09-25 12:18:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:18:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:18:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 12:18:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 12:18:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 12:18:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 12:18:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 12:18:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 12:18:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 12:18:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 12:18:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 12:18:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 12:18:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 12:18:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 12:18:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 12:18:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 12:18:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 12:18:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 12:18:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 12:18:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 12:18:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 12:18:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 12:18:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 12:18:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 12:18:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 12:18:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 12:18:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 12:18:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 12:18:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 12:18:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 12:18:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 12:18:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 12:18:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 12:18:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 12:18:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 12:18:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 12:18:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 12:18:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 12:18:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 12:18:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 12:18:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 12:18:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 12:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 12:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 12:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 12:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 12:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 12:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 12:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 12:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 12:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 12:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 12:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 12:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 12:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 12:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 12:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 12:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 12:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 12:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 12:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 12:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 12:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 12:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 12:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 12:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 12:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 12:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 12:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 12:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 12:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 12:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 12:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 12:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 12:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 12:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 12:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 12:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 12:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 12:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 12:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 12:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 12:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 12:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 12:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 12:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 12:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 12:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 12:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 12:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 12:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 12:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 12:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 12:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 12:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 12:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 12:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 12:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 12:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 12:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 12:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 12:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 12:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-25 12:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-09-25 12:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 12:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 12:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-09-25 12:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 12:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-09-25 12:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 12:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-25 12:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 12:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-09-25 12:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-09-25 12:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-09-25 12:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-09-25 12:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-09-25 12:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:18:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:18:47,570 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:18:47,571 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-25 12:18:47,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:47 BoogieIcfgContainer [2020-09-25 12:18:47,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:18:47,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:18:47,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:18:47,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:18:47,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:18:45" (1/3) ... [2020-09-25 12:18:47,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46931435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:47, skipping insertion in model container [2020-09-25 12:18:47,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:46" (2/3) ... [2020-09-25 12:18:47,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46931435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:47, skipping insertion in model container [2020-09-25 12:18:47,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:47" (3/3) ... [2020-09-25 12:18:47,589 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-09-25 12:18:47,602 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:18:47,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:18:47,635 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:18:47,689 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:18:47,689 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:18:47,689 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:18:47,690 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:18:47,690 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:18:47,690 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:18:47,690 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:18:47,690 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:18:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2020-09-25 12:18:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 12:18:47,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:18:47,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:18:47,749 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:18:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:18:47,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times [2020-09-25 12:18:47,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:18:47,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919489298] [2020-09-25 12:18:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:18:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:18:47,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:18:48,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 12:18:48,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:18:48,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-09-25 12:18:48,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:18:48,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:18:48,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:18:48,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 12:18:48,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:18:48,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:18:48,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:18:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:18:48,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:18:48,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:18:48,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:18:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 12:18:48,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:18:48,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:18:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:18:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:18:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:18:48,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:18:48,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 12:18:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:18:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:48,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:18:48,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 12:18:48,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:18:48,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 12:18:48,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:18:48,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:18:48,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:18:48,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 12:18:48,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:18:48,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:18:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:18:48,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919489298] [2020-09-25 12:18:48,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:18:48,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:18:48,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265876042] [2020-09-25 12:18:48,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:18:48,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:18:48,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:18:48,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:18:48,593 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 4 states. [2020-09-25 12:18:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:18:49,180 INFO L93 Difference]: Finished difference Result 423 states and 572 transitions. [2020-09-25 12:18:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:18:49,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 12:18:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:18:49,207 INFO L225 Difference]: With dead ends: 423 [2020-09-25 12:18:49,208 INFO L226 Difference]: Without dead ends: 211 [2020-09-25 12:18:49,222 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 [2020-09-25 12:18:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-25 12:18:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188. [2020-09-25 12:18:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-25 12:18:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions. [2020-09-25 12:18:49,314 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41 [2020-09-25 12:18:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:18:49,315 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 208 transitions. [2020-09-25 12:18:49,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:18:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions. [2020-09-25 12:18:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 12:18:49,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:18:49,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:18:49,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:18:49,324 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:18:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:18:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times [2020-09-25 12:18:49,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:18:49,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852297187] [2020-09-25 12:18:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:18:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:18:49,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:50,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:52,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:54,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:18:54,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 12:18:54,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:18:54,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 12:18:54,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:18:54,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:18:54,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-25 12:18:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:18:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-25 12:18:54,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:18:54,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:18:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:18:54,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:54,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:18:54,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:18:54,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:18:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:18:54,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:18:54,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:18:54,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:18:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:18:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:18:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:18:54,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 12:18:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:18:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:18:59,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:18:59,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 12:18:59,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:18:59,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 12:18:59,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:18:59,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:18:59,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 12:18:59,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:18:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-25 12:18:59,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:19:00,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-25 12:19:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:19:00,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:00,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:00,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:19:00,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 12:19:00,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:19:00,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-09-25 12:19:00,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:19:00,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:19:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:19:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:19:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 12:19:00,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:19:00,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 12:19:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:19:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:01,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:19:01,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 12:19:01,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:19:01,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-25 12:19:01,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:19:01,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:19:01,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:19:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:19:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 12:19:01,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:19:01,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 12:19:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:19:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:01,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:19:01,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 12:19:01,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:19:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-09-25 12:19:01,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:19:01,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:19:01,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 12:19:01,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 12:19:01,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 12:19:01,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:19:06,844 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-09-25 12:19:07,129 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-09-25 12:19:07,422 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-09-25 12:19:12,442 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 266 DAG size of output: 142 [2020-09-25 12:19:13,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 12:19:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:19:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:13,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:19:13,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 12:19:13,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:19:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-09-25 12:19:13,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:19:13,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:19:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:19:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 12:19:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 12:19:13,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:19:14,506 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2020-09-25 12:19:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 12:19:14,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852297187] [2020-09-25 12:19:14,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:19:14,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 12:19:14,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832116747] [2020-09-25 12:19:14,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 12:19:14,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:19:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 12:19:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-09-25 12:19:14,594 INFO L87 Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 30 states. [2020-09-25 12:19:15,769 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-09-25 12:19:16,043 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-09-25 12:19:16,237 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-09-25 12:19:18,637 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 165 [2020-09-25 12:19:21,065 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 158 [2020-09-25 12:19:23,564 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 12:19:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:19:41,934 INFO L93 Difference]: Finished difference Result 272 states and 310 transitions. [2020-09-25 12:19:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 12:19:41,936 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-09-25 12:19:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:19:41,940 INFO L225 Difference]: With dead ends: 272 [2020-09-25 12:19:41,940 INFO L226 Difference]: Without dead ends: 269 [2020-09-25 12:19:41,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 12:19:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-25 12:19:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2020-09-25 12:19:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-25 12:19:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2020-09-25 12:19:41,970 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85 [2020-09-25 12:19:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:19:41,971 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2020-09-25 12:19:41,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 12:19:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2020-09-25 12:19:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 12:19:41,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:19:41,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:19:41,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:19:41,974 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:19:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:19:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times [2020-09-25 12:19:41,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:19:41,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638087488] [2020-09-25 12:19:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:19:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:19:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:42,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:19:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking...