/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/nla-digbench/hard.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:19:59,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:19:59,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:19:59,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:19:59,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:19:59,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:19:59,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:19:59,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:19:59,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:19:59,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:19:59,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:19:59,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:19:59,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:19:59,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:19:59,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:19:59,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:19:59,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:19:59,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:19:59,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:19:59,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:19:59,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:19:59,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:19:59,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:19:59,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:19:59,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:19:59,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:19:59,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:19:59,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:19:59,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:19:59,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:19:59,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:19:59,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:19:59,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:19:59,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:19:59,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:19:59,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:19:59,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:19:59,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:19:59,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:19:59,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:19:59,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:19:59,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:19:59,361 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:19:59,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:19:59,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:19:59,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:19:59,367 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:19:59,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:19:59,367 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:19:59,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:19:59,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:19:59,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:19:59,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:19:59,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:19:59,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:19:59,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:19:59,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:19:59,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:19:59,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:19:59,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:19:59,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:19:59,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:19:59,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:19:59,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:19:59,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:19:59,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:19:59,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:19:59,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:19:59,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:19:59,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:19:59,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:19:59,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:19:59,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:19:59,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:19:59,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:19:59,889 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:19:59,890 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:19:59,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard.c [2020-10-28 15:19:59,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e22a03f5/6c25e347ec0d4b7baa76b98bebbc29a4/FLAGa0d82f668 [2020-10-28 15:20:00,717 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:20:00,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/hard.c [2020-10-28 15:20:00,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e22a03f5/6c25e347ec0d4b7baa76b98bebbc29a4/FLAGa0d82f668 [2020-10-28 15:20:01,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e22a03f5/6c25e347ec0d4b7baa76b98bebbc29a4 [2020-10-28 15:20:01,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:20:01,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:20:01,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:20:01,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:20:01,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:20:01,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6c706c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01, skipping insertion in model container [2020-10-28 15:20:01,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:20:01,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:20:01,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:20:01,325 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:20:01,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:20:01,363 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:20:01,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01 WrapperNode [2020-10-28 15:20:01,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:20:01,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:20:01,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:20:01,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:20:01,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... [2020-10-28 15:20:01,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:20:01,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:20:01,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:20:01,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:20:01,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:20:01,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:20:01,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:20:01,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:20:01,497 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:20:01,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:20:01,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:20:01,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:20:01,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:20:01,498 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:20:01,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:20:01,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:20:01,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:20:01,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:20:01,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:20:01,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:20:01,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:20:01,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:20:01,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:20:01,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:20:01,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:20:01,919 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:20:01,919 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:20:01,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:20:01 BoogieIcfgContainer [2020-10-28 15:20:01,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:20:01,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:20:01,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:20:01,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:20:01,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:20:01" (1/3) ... [2020-10-28 15:20:01,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f643885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:20:01, skipping insertion in model container [2020-10-28 15:20:01,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:20:01" (2/3) ... [2020-10-28 15:20:01,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f643885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:20:01, skipping insertion in model container [2020-10-28 15:20:01,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:20:01" (3/3) ... [2020-10-28 15:20:01,932 INFO L111 eAbstractionObserver]: Analyzing ICFG hard.c [2020-10-28 15:20:01,946 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:20:01,974 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:20:01,991 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:20:02,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:20:02,022 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:20:02,022 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:20:02,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:20:02,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:20:02,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:20:02,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:20:02,023 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:20:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 15:20:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:20:02,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:02,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:02,053 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1711597889, now seen corresponding path program 1 times [2020-10-28 15:20:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:02,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489358734] [2020-10-28 15:20:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:02,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:02,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:02,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:02,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:20:02,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:20:02,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-28 15:20:02,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:02,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:02,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:20:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:20:02,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:02,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:02,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:02,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:02,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:20:02,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:02,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:02,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:02,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:02,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:02,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:02,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 15:20:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:02,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:02,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:02,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:02,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:20:02,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:02,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:02,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 15:20:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:20:02,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489358734] [2020-10-28 15:20:02,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:20:02,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:20:02,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971852546] [2020-10-28 15:20:02,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:20:02,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:02,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:20:02,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:20:02,923 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 15:20:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:03,065 INFO L93 Difference]: Finished difference Result 65 states and 100 transitions. [2020-10-28 15:20:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:20:03,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 15:20:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:03,077 INFO L225 Difference]: With dead ends: 65 [2020-10-28 15:20:03,077 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:20:03,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:20:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:20:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 15:20:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:20:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-28 15:20:03,135 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2020-10-28 15:20:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:03,136 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-28 15:20:03,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:20:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-28 15:20:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:20:03,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:03,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:03,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:20:03,138 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1318570879, now seen corresponding path program 1 times [2020-10-28 15:20:03,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:03,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19526553] [2020-10-28 15:20:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:03,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:03,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:03,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:20:03,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:03,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 15:20:03,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:03,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:20:03,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:20:03,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:20:03,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:20:03,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:03,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:03,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:03,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:03,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:03,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:20:03,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:03,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:03,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:03,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:03,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 15:20:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:03,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:03,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:03,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:03,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:03,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:03,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:03,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:03,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 27 [2020-10-28 15:20:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:20:03,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19526553] [2020-10-28 15:20:03,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:20:03,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:20:03,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840595454] [2020-10-28 15:20:03,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:20:03,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:03,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:20:03,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:20:03,524 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 6 states. [2020-10-28 15:20:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:03,875 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-28 15:20:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:20:03,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:20:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:03,878 INFO L225 Difference]: With dead ends: 45 [2020-10-28 15:20:03,878 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:20:03,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:20:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:20:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-28 15:20:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:20:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-10-28 15:20:03,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2020-10-28 15:20:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:03,895 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-10-28 15:20:03,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:20:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-10-28 15:20:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:20:03,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:03,897 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] [2020-10-28 15:20:03,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:20:03,897 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1308691435, now seen corresponding path program 1 times [2020-10-28 15:20:03,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:03,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791860936] [2020-10-28 15:20:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:03,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:04,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:04,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:20:04,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:04,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 15:20:04,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:04,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:04,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:20:04,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:20:04,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:20:04,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:04,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:04,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:04,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:04,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:20:04,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:04,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:04,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:04,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:04,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:04,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 15:20:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:04,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:04,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:04,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:04,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:04,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:20:04,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:04,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:04,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 15:20:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:04,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:04,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:20:04,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:04,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:20:04,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:04,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:04,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:20:04,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:04,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:20:04,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:20:04,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791860936] [2020-10-28 15:20:04,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:20:04,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:20:04,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460941222] [2020-10-28 15:20:04,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:20:04,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:20:04,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:20:04,172 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 6 states. [2020-10-28 15:20:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:04,593 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-28 15:20:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:20:04,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 15:20:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:04,595 INFO L225 Difference]: With dead ends: 49 [2020-10-28 15:20:04,596 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 15:20:04,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:20:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 15:20:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-28 15:20:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:20:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-28 15:20:04,614 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2020-10-28 15:20:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:04,616 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-28 15:20:04,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:20:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-28 15:20:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:20:04,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:04,618 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:04,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:20:04,618 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2050035519, now seen corresponding path program 1 times [2020-10-28 15:20:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:04,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534969840] [2020-10-28 15:20:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:04,648 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-28 15:20:04,648 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-28 15:20:04,648 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 15:20:04,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:20:04,670 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-28 15:20:04,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:20:04 BoogieIcfgContainer [2020-10-28 15:20:04,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:20:04,674 INFO L168 Benchmark]: Toolchain (without parser) took 3578.72 ms. Allocated memory was 151.0 MB in the beginning and 195.0 MB in the end (delta: 44.0 MB). Free memory was 126.6 MB in the beginning and 134.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 37.8 MB. Max. memory is 8.0 GB. [2020-10-28 15:20:04,675 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:20:04,676 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.63 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:20:04,677 INFO L168 Benchmark]: Boogie Preprocessor took 39.08 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:20:04,677 INFO L168 Benchmark]: RCFGBuilder took 515.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 99.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 15:20:04,679 INFO L168 Benchmark]: TraceAbstraction took 2747.53 ms. Allocated memory was 151.0 MB in the beginning and 195.0 MB in the end (delta: 44.0 MB). Free memory was 99.2 MB in the beginning and 134.0 MB in the end (delta: -34.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:20:04,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.63 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.08 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 515.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 99.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2747.53 ms. Allocated memory was 151.0 MB in the beginning and 195.0 MB in the end (delta: 44.0 MB). Free memory was 99.2 MB in the beginning and 134.0 MB in the end (delta: -34.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] int A, B; [L24] int r, d, p, q; [L25] A = __VERIFIER_nondet_int() [L26] B = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L27] RET assume_abort_if_not(B >= 1) [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] CALL reach_error() [L8] __assert_fail("0", "hard.c", 8, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 88 SDslu, 71 SDs, 0 SdLazy, 211 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 3142 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...