/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:08:40,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:08:40,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:08:40,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:08:40,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:08:40,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:08:40,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:08:40,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:08:40,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:08:40,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:08:40,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:08:40,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:08:40,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:08:40,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:08:40,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:08:40,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:08:40,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:08:40,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:08:40,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:08:40,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:08:40,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:08:40,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:08:40,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:08:40,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:08:40,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:08:40,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:08:40,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:08:40,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:08:40,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:08:40,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:08:40,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:08:40,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:08:40,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:08:40,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:08:40,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:08:40,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:08:40,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:08:40,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:08:40,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:08:40,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:08:40,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:08:40,203 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 [2020-09-24 17:08:40,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:08:40,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:08:40,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:08:40,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:08:40,268 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:08:40,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:08:40,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:08:40,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:08:40,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:08:40,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:08:40,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:08:40,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:08:40,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:08:40,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:08:40,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:08:40,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:08:40,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:08:40,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:08:40,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:08:40,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:08:40,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:08:40,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:08:40,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:08:40,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:08:40,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:08:40,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:08:40,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:08:40,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:08:40,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:08:40,274 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;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;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;log-additional-information=true; [2020-09-24 17:08:40,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:08:40,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:08:40,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:08:40,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:08:40,806 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:08:40,808 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-09-24 17:08:40,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b130bafe/8d1e6901deae423d8508005eb7aa9750/FLAGcb1ab2443 [2020-09-24 17:08:41,565 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:08:41,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-09-24 17:08:41,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b130bafe/8d1e6901deae423d8508005eb7aa9750/FLAGcb1ab2443 [2020-09-24 17:08:41,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b130bafe/8d1e6901deae423d8508005eb7aa9750 [2020-09-24 17:08:41,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:08:41,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:08:41,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:08:41,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:08:41,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:08:41,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:08:41" (1/1) ... [2020-09-24 17:08:41,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0b7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:41, skipping insertion in model container [2020-09-24 17:08:41,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:08:41" (1/1) ... [2020-09-24 17:08:41,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:08:41,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:08:42,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:08:42,372 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:08:42,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:08:42,479 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:08:42,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42 WrapperNode [2020-09-24 17:08:42,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:08:42,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:08:42,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:08:42,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:08:42,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (1/1) ... [2020-09-24 17:08:42,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (1/1) ... [2020-09-24 17:08:42,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (1/1) ... [2020-09-24 17:08:42,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (1/1) ... [2020-09-24 17:08:42,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (1/1) ... [2020-09-24 17:08:42,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (1/1) ... [2020-09-24 17:08:42,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (1/1) ... [2020-09-24 17:08:42,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:08:42,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:08:42,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:08:42,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:08:42,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (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 [2020-09-24 17:08:42,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:08:42,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:08:42,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:08:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 17:08:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 17:08:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 17:08:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 17:08:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 17:08:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 17:08:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 17:08:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 17:08:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 17:08:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 17:08:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 17:08:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 17:08:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 17:08:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 17:08:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 17:08:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 17:08:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 17:08:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 17:08:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 17:08:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 17:08:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 17:08:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 17:08:42,642 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 17:08:42,642 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 17:08:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 17:08:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 17:08:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 17:08:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 17:08:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 17:08:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 17:08:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 17:08:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 17:08:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 17:08:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 17:08:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 17:08:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 17:08:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 17:08:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 17:08:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 17:08:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 17:08:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 17:08:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 17:08:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 17:08:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 17:08:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 17:08:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 17:08:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 17:08:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 17:08:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 17:08:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 17:08:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 17:08:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 17:08:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 17:08:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 17:08:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 17:08:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 17:08:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 17:08:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 17:08:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 17:08:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:08:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 17:08:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 17:08:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 17:08:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 17:08:42,649 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 17:08:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 17:08:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 17:08:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 17:08:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 17:08:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 17:08:42,650 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 17:08:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 17:08:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 17:08:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 17:08:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 17:08:42,651 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 17:08:42,652 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 17:08:42,652 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 17:08:42,652 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 17:08:42,652 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 17:08:42,652 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 17:08:42,652 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 17:08:42,653 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 17:08:42,654 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:08:42,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 17:08:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:08:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:08:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:08:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:08:43,286 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:08:43,287 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-09-24 17:08:43,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:08:43 BoogieIcfgContainer [2020-09-24 17:08:43,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:08:43,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:08:43,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:08:43,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:08:43,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:08:41" (1/3) ... [2020-09-24 17:08:43,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1c1c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:08:43, skipping insertion in model container [2020-09-24 17:08:43,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:08:42" (2/3) ... [2020-09-24 17:08:43,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1c1c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:08:43, skipping insertion in model container [2020-09-24 17:08:43,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:08:43" (3/3) ... [2020-09-24 17:08:43,318 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2020-09-24 17:08:43,335 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:08:43,351 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-09-24 17:08:43,375 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-24 17:08:43,415 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:08:43,416 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:08:43,416 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:08:43,416 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:08:43,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:08:43,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:08:43,417 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:08:43,418 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:08:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-09-24 17:08:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 17:08:43,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:43,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:43,478 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:43,487 INFO L82 PathProgramCache]: Analyzing trace with hash -976698803, now seen corresponding path program 1 times [2020-09-24 17:08:43,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:43,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685649714] [2020-09-24 17:08:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:43,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:43,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:44,369 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:44,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 17:08:44,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:08:44,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-09-24 17:08:44,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 17:08:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:08:44,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:08:44,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:08:44,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:44,663 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:44,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:44,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 17:08:44,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:44,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685649714] [2020-09-24 17:08:44,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:44,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 17:08:44,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255757851] [2020-09-24 17:08:44,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:08:44,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:08:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:08:44,720 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 9 states. [2020-09-24 17:08:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:45,327 INFO L93 Difference]: Finished difference Result 271 states and 328 transitions. [2020-09-24 17:08:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 17:08:45,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-09-24 17:08:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:45,345 INFO L225 Difference]: With dead ends: 271 [2020-09-24 17:08:45,345 INFO L226 Difference]: Without dead ends: 147 [2020-09-24 17:08:45,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:08:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-24 17:08:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 82. [2020-09-24 17:08:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-24 17:08:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-09-24 17:08:45,444 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 20 [2020-09-24 17:08:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:45,445 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-09-24 17:08:45,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:08:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-09-24 17:08:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 17:08:45,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:45,449 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] [2020-09-24 17:08:45,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:08:45,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash 340604940, now seen corresponding path program 1 times [2020-09-24 17:08:45,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:45,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75357530] [2020-09-24 17:08:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:45,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:45,736 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:45,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 17:08:45,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:45,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-09-24 17:08:45,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:45,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:08:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 17:08:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 17:08:45,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:45,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:45,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:45,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:45,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:45,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:45,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:08:45,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:45,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:45,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:45,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:45,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:45,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75357530] [2020-09-24 17:08:45,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:45,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 17:08:45,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614468032] [2020-09-24 17:08:45,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:08:45,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:45,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:08:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:08:45,883 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 7 states. [2020-09-24 17:08:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:46,300 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2020-09-24 17:08:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:08:46,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-24 17:08:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:46,303 INFO L225 Difference]: With dead ends: 118 [2020-09-24 17:08:46,303 INFO L226 Difference]: Without dead ends: 116 [2020-09-24 17:08:46,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:08:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-24 17:08:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2020-09-24 17:08:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-24 17:08:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-09-24 17:08:46,314 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 28 [2020-09-24 17:08:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:46,315 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-09-24 17:08:46,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:08:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-09-24 17:08:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:08:46,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:46,317 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] [2020-09-24 17:08:46,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:08:46,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1933129776, now seen corresponding path program 1 times [2020-09-24 17:08:46,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:46,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183292553] [2020-09-24 17:08:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:48,085 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:48,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 17:08:48,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:08:48,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1746 [2020-09-24 17:08:48,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:48,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:08:48,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:08:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:08:48,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:48,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:48,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:48,133 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:48,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:48,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:48,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:08:48,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:48,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:48,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:48,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183292553] [2020-09-24 17:08:48,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:48,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:08:48,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418180922] [2020-09-24 17:08:48,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:08:48,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:08:48,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:08:48,142 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 4 states. [2020-09-24 17:08:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:48,260 INFO L93 Difference]: Finished difference Result 195 states and 210 transitions. [2020-09-24 17:08:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 17:08:48,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-09-24 17:08:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:48,262 INFO L225 Difference]: With dead ends: 195 [2020-09-24 17:08:48,262 INFO L226 Difference]: Without dead ends: 136 [2020-09-24 17:08:48,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:08:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-24 17:08:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2020-09-24 17:08:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 17:08:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2020-09-24 17:08:48,275 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 33 [2020-09-24 17:08:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:48,275 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2020-09-24 17:08:48,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:08:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2020-09-24 17:08:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:08:48,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:48,277 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] [2020-09-24 17:08:48,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:08:48,278 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:48,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1127481847, now seen corresponding path program 1 times [2020-09-24 17:08:48,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:48,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191685281] [2020-09-24 17:08:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:48,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:49,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:50,321 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:50,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 17:08:50,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:08:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2021 [2020-09-24 17:08:50,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 17:08:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:08:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:08:50,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:08:50,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:50,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:50,541 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:50,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:50,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:50,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:50,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:50,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:50,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:50,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191685281] [2020-09-24 17:08:50,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:08:50,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 17:08:50,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875978725] [2020-09-24 17:08:50,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:08:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:08:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:08:50,553 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand 12 states. [2020-09-24 17:08:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:51,083 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2020-09-24 17:08:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 17:08:51,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-24 17:08:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:51,086 INFO L225 Difference]: With dead ends: 190 [2020-09-24 17:08:51,086 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 17:08:51,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-09-24 17:08:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 17:08:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2020-09-24 17:08:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 17:08:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-09-24 17:08:51,097 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 37 [2020-09-24 17:08:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:51,098 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-09-24 17:08:51,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:08:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-09-24 17:08:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:08:51,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:51,100 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:08:51,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:08:51,100 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash 821991267, now seen corresponding path program 1 times [2020-09-24 17:08:51,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:51,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085910621] [2020-09-24 17:08:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:51,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:52,534 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:52,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 17:08:52,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:08:52,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-09-24 17:08:52,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:52,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 17:08:52,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:08:52,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:08:52,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:52,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:08:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:08:52,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:08:52,811 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:08:52,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:08:52,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:08:52,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:08:52,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:08:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:08:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:08:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:08:52,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:08:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:08:52,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085910621] [2020-09-24 17:08:52,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:08:52,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 17:08:52,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950684258] [2020-09-24 17:08:52,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 17:08:52,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:08:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 17:08:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:08:52,823 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 14 states. [2020-09-24 17:08:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:08:53,717 INFO L93 Difference]: Finished difference Result 192 states and 202 transitions. [2020-09-24 17:08:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 17:08:53,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-09-24 17:08:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:08:53,720 INFO L225 Difference]: With dead ends: 192 [2020-09-24 17:08:53,720 INFO L226 Difference]: Without dead ends: 190 [2020-09-24 17:08:53,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2020-09-24 17:08:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-24 17:08:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 103. [2020-09-24 17:08:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 17:08:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-09-24 17:08:53,745 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 37 [2020-09-24 17:08:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:08:53,746 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-09-24 17:08:53,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 17:08:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-09-24 17:08:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 17:08:53,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:08:53,751 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] [2020-09-24 17:08:53,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:08:53,751 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:08:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:08:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1168005107, now seen corresponding path program 1 times [2020-09-24 17:08:53,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:08:53,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124568191] [2020-09-24 17:08:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:08:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 17:08:53,777 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 17:08:53,777 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 17:08:53,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:08:53,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:08:53 BoogieIcfgContainer [2020-09-24 17:08:53,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:08:53,813 INFO L168 Benchmark]: Toolchain (without parser) took 12022.57 ms. Allocated memory was 137.9 MB in the beginning and 340.8 MB in the end (delta: 202.9 MB). Free memory was 98.9 MB in the beginning and 293.4 MB in the end (delta: -194.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:08:53,814 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 17:08:53,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 686.99 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 98.2 MB in the beginning and 167.6 MB in the end (delta: -69.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-24 17:08:53,822 INFO L168 Benchmark]: Boogie Preprocessor took 70.63 ms. Allocated memory is still 200.3 MB. Free memory was 167.6 MB in the beginning and 164.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-24 17:08:53,822 INFO L168 Benchmark]: RCFGBuilder took 747.90 ms. Allocated memory is still 200.3 MB. Free memory was 164.8 MB in the beginning and 116.3 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2020-09-24 17:08:53,823 INFO L168 Benchmark]: TraceAbstraction took 10507.31 ms. Allocated memory was 200.3 MB in the beginning and 340.8 MB in the end (delta: 140.5 MB). Free memory was 115.6 MB in the beginning and 293.4 MB in the end (delta: -177.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 17:08:53,836 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 686.99 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 98.2 MB in the beginning and 167.6 MB in the end (delta: -69.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.63 ms. Allocated memory is still 200.3 MB. Free memory was 167.6 MB in the beginning and 164.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 747.90 ms. Allocated memory is still 200.3 MB. Free memory was 164.8 MB in the beginning and 116.3 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10507.31 ms. Allocated memory was 200.3 MB in the beginning and 340.8 MB in the end (delta: 140.5 MB). Free memory was 115.6 MB in the beginning and 293.4 MB in the end (delta: -177.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1021]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = head [L987] head->data = 0 [L989] SLL* x = head; [L990] int state = 1; [L993] COND FALSE !(__VERIFIER_nondet_int()) [L1014] x->data = state [L1016] EXPR head->next [L1016] x = head->next [L1017] COND FALSE !(!(((void*)0) != x)) [L1019] EXPR x->data [L1019] COND TRUE x->data != 0 [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] EXPR x->data [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1021] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 415 SDtfs, 1298 SDslu, 1564 SDs, 0 SdLazy, 982 SolverSat, 95 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 282 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 33876 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 0/2 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...