/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/bitvector/num_conversion_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:35:55,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:35:55,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:35:55,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:35:55,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:35:55,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:35:55,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:35:55,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:35:55,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:35:55,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:35:55,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:35:55,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:35:55,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:35:55,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:35:55,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:35:55,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:35:55,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:35:55,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:35:55,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:35:55,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:35:55,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:35:55,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:35:55,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:35:55,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:35:55,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:35:55,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:35:55,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:35:55,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:35:55,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:35:55,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:35:55,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:35:55,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:35:55,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:35:55,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:35:55,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:35:55,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:35:55,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:35:55,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:35:55,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:35:55,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:35:55,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:35:55,531 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 09:35:55,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:35:55,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:35:55,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:35:55,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:35:55,593 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:35:55,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:35:55,593 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:35:55,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:35:55,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:35:55,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:35:55,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:35:55,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:35:55,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:35:55,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:35:55,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:35:55,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:35:55,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:35:55,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:35:55,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:35:55,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:35:55,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:35:55,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:35:55,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:35:55,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:35:55,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:35:55,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:35:55,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:35:55,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:35:55,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:35:55,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:35:56,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:35:56,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:35:56,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:35:56,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:35:56,082 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:35:56,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/num_conversion_2.c [2020-10-28 09:35:56,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/278aa8cb9/f4ba1aaa955e4288aafe4de180d24e54/FLAGb4b784b6d [2020-10-28 09:35:56,929 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:35:56,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/num_conversion_2.c [2020-10-28 09:35:56,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/278aa8cb9/f4ba1aaa955e4288aafe4de180d24e54/FLAGb4b784b6d [2020-10-28 09:35:56,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/278aa8cb9/f4ba1aaa955e4288aafe4de180d24e54 [2020-10-28 09:35:56,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:35:56,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:35:56,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:56,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:35:56,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:35:56,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:56" (1/1) ... [2020-10-28 09:35:56,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606cba56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:56, skipping insertion in model container [2020-10-28 09:35:56,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:56" (1/1) ... [2020-10-28 09:35:56,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:35:57,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:35:57,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:57,196 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:35:57,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:57,235 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:35:57,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57 WrapperNode [2020-10-28 09:35:57,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:57,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:35:57,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:35:57,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:35:57,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (1/1) ... [2020-10-28 09:35:57,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (1/1) ... [2020-10-28 09:35:57,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (1/1) ... [2020-10-28 09:35:57,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (1/1) ... [2020-10-28 09:35:57,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (1/1) ... [2020-10-28 09:35:57,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (1/1) ... [2020-10-28 09:35:57,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (1/1) ... [2020-10-28 09:35:57,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:35:57,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:35:57,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:35:57,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:35:57,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (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 09:35:57,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:35:57,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:35:57,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:35:57,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:35:57,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:35:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:35:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:35:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:35:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:35:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 09:35:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:35:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:35:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:35:57,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:35:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:35:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:35:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:35:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:35:57,680 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:35:57,680 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 09:35:57,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:57 BoogieIcfgContainer [2020-10-28 09:35:57,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:35:57,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:35:57,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:35:57,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:35:57,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:35:56" (1/3) ... [2020-10-28 09:35:57,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d0a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:57, skipping insertion in model container [2020-10-28 09:35:57,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:57" (2/3) ... [2020-10-28 09:35:57,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d0a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:57, skipping insertion in model container [2020-10-28 09:35:57,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:57" (3/3) ... [2020-10-28 09:35:57,696 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2020-10-28 09:35:57,712 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:35:57,721 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:35:57,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:35:57,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:35:57,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:35:57,865 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:35:57,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:35:57,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:35:57,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:35:57,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:35:57,866 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:35:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 09:35:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 09:35:57,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:57,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:57,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1553397026, now seen corresponding path program 1 times [2020-10-28 09:35:57,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:57,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41416062] [2020-10-28 09:35:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:58,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:58,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:58,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 09:35:58,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:58,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-28 09:35:58,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:58,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:58,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:58,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:35:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:58,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:35:58,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:58,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:58,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:58,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:58,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:58,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 09:35:58,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:58,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:58,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:58,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:58,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:58,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:58,445 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 09:35:58,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41416062] [2020-10-28 09:35:58,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:58,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:35:58,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497934525] [2020-10-28 09:35:58,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:35:58,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:58,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:35:58,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:35:58,473 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 09:35:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:58,546 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 09:35:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:35:58,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 09:35:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:58,556 INFO L225 Difference]: With dead ends: 38 [2020-10-28 09:35:58,557 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 09:35:58,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:35:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 09:35:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 09:35:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 09:35:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 09:35:58,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-28 09:35:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:58,603 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 09:35:58,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:35:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 09:35:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 09:35:58,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:58,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:58,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:35:58,605 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1868317687, now seen corresponding path program 1 times [2020-10-28 09:35:58,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:58,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636312258] [2020-10-28 09:35:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:58,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:58,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 09:35:58,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:58,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 09:35:58,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:58,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:35:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:35:58,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:58,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:58,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:58,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:58,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:58,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:35:58,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:58,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:58,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:58,901 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 09:35:58,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636312258] [2020-10-28 09:35:58,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:58,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:35:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003991439] [2020-10-28 09:35:58,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:35:58,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:35:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:35:58,905 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 09:35:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:59,038 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 09:35:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:35:59,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 09:35:59,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:59,040 INFO L225 Difference]: With dead ends: 24 [2020-10-28 09:35:59,040 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 09:35:59,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:35:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 09:35:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-28 09:35:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 09:35:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 09:35:59,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 09:35:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:59,052 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 09:35:59,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:35:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 09:35:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:35:59,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:59,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:59,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:35:59,054 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:59,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1031623051, now seen corresponding path program 1 times [2020-10-28 09:35:59,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:59,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606049711] [2020-10-28 09:35:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:59,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:59,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:35:59,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:59,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-28 09:35:59,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:59,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:35:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:35:59,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:59,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:59,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:59,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:59,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:59,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:59,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:35:59,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:59,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:59,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:59,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606049711] [2020-10-28 09:35:59,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:59,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:35:59,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954569766] [2020-10-28 09:35:59,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:35:59,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:59,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:35:59,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:35:59,409 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-28 09:35:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:59,695 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-28 09:35:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:35:59,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 09:35:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:59,697 INFO L225 Difference]: With dead ends: 27 [2020-10-28 09:35:59,698 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:35:59,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:35:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:35:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 09:35:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 09:35:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 09:35:59,709 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 09:35:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:59,710 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 09:35:59,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:35:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 09:35:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 09:35:59,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:59,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:59,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:35:59,712 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash -101010231, now seen corresponding path program 2 times [2020-10-28 09:35:59,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:59,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754904848] [2020-10-28 09:35:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:59,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:59,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:59,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 09:35:59,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:59,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 09:35:59,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:59,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:59,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:35:59,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:59,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:35:59,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:59,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:59,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:59,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:59,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:59,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:35:59,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:59,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:59,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754904848] [2020-10-28 09:35:59,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:35:59,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:35:59,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573826554] [2020-10-28 09:35:59,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:35:59,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:59,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:35:59,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:35:59,964 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-28 09:36:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:36:00,232 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-28 09:36:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:36:00,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 09:36:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:36:00,234 INFO L225 Difference]: With dead ends: 30 [2020-10-28 09:36:00,234 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 09:36:00,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:36:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 09:36:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-28 09:36:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 09:36:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-28 09:36:00,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-28 09:36:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:36:00,243 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-28 09:36:00,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:36:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-28 09:36:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:36:00,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:36:00,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:36:00,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:36:00,245 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:36:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:36:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1116036917, now seen corresponding path program 3 times [2020-10-28 09:36:00,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:36:00,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665081709] [2020-10-28 09:36:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:36:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:00,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:00,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:00,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:36:00,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:00,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 09:36:00,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:00,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:00,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:36:00,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:36:00,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:36:00,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:36:00,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:36:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:00,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:00,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:00,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:36:00,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:36:00,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:00,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:00,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:36:00,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:36:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:36:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:36:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:36:00,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665081709] [2020-10-28 09:36:00,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:36:00,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:36:00,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252805456] [2020-10-28 09:36:00,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:36:00,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:36:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:36:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:36:00,611 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-28 09:36:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:36:01,066 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-28 09:36:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:36:01,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 09:36:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:36:01,068 INFO L225 Difference]: With dead ends: 33 [2020-10-28 09:36:01,068 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:36:01,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:36:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:36:01,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-28 09:36:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:36:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-28 09:36:01,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-28 09:36:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:36:01,077 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-28 09:36:01,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:36:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-28 09:36:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:36:01,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:36:01,078 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:36:01,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:36:01,079 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:36:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:36:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1088691593, now seen corresponding path program 4 times [2020-10-28 09:36:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:36:01,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143521024] [2020-10-28 09:36:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:36:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:01,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:01,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:01,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:36:01,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-28 09:36:01,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:01,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:36:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:36:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:36:01,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:01,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:36:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:01,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:01,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:01,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:36:01,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:01,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:36:01,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:01,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:01,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:36:01,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:36:01,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:36:01,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:36:01,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143521024] [2020-10-28 09:36:01,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:36:01,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:36:01,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668150875] [2020-10-28 09:36:01,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:36:01,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:36:01,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:36:01,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:36:01,426 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-10-28 09:36:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:36:01,834 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-28 09:36:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:36:01,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 09:36:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:36:01,835 INFO L225 Difference]: With dead ends: 36 [2020-10-28 09:36:01,836 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 09:36:01,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:36:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 09:36:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-28 09:36:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:36:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-28 09:36:01,844 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-28 09:36:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:36:01,844 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-28 09:36:01,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:36:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-28 09:36:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:36:01,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:36:01,845 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:36:01,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:36:01,846 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:36:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:36:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash -779124725, now seen corresponding path program 5 times [2020-10-28 09:36:01,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:36:01,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098510343] [2020-10-28 09:36:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:36:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:01,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:01,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:01,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:36:01,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:01,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 09:36:01,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:01,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:36:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:36:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:36:01,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:02,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:36:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:02,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:02,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:36:02,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:36:02,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:02,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:36:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:36:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:36:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:36:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098510343] [2020-10-28 09:36:02,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:36:02,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:36:02,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038613597] [2020-10-28 09:36:02,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:36:02,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:36:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:36:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:36:02,177 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-28 09:36:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:36:02,610 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-28 09:36:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:36:02,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 09:36:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:36:02,611 INFO L225 Difference]: With dead ends: 39 [2020-10-28 09:36:02,611 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:36:02,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:36:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:36:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-28 09:36:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:36:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-28 09:36:02,620 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-28 09:36:02,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:36:02,620 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-28 09:36:02,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:36:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-28 09:36:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:36:02,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:36:02,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:36:02,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:36:02,622 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:36:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:36:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash 701232713, now seen corresponding path program 6 times [2020-10-28 09:36:02,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:36:02,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196945572] [2020-10-28 09:36:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:36:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:02,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:02,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:36:02,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:02,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 09:36:02,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:02,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:36:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:36:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:36:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:03,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:36:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:03,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:03,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:03,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:36:03,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:03,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:36:03,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:03,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:36:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:36:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:36:03,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:36:03,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196945572] [2020-10-28 09:36:03,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:36:03,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:36:03,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814406358] [2020-10-28 09:36:03,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:36:03,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:36:03,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:36:03,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:36:03,034 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2020-10-28 09:36:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:36:03,633 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-28 09:36:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:36:03,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 09:36:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:36:03,636 INFO L225 Difference]: With dead ends: 42 [2020-10-28 09:36:03,636 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:36:03,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:36:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:36:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-28 09:36:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:36:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-28 09:36:03,644 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-28 09:36:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:36:03,645 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-28 09:36:03,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:36:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-28 09:36:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:36:03,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:36:03,646 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:36:03,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:36:03,647 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:36:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:36:03,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1305472843, now seen corresponding path program 7 times [2020-10-28 09:36:03,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:36:03,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339728982] [2020-10-28 09:36:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:36:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:03,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:03,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:03,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:36:03,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:03,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 09:36:03,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:03,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:36:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:36:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:36:03,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:36:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:36:04,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:36:04,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:36:04,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:36:04,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:36:04,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:36:04,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:36:04,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:36:04,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:36:04,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:36:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:36:04,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:36:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:36:04,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339728982] [2020-10-28 09:36:04,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:36:04,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:36:04,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404876615] [2020-10-28 09:36:04,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:36:04,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:36:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:36:04,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:36:04,043 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 11 states. [2020-10-28 09:36:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:36:04,806 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-28 09:36:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:36:04,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-28 09:36:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:36:04,809 INFO L225 Difference]: With dead ends: 43 [2020-10-28 09:36:04,809 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 09:36:04,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:36:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 09:36:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 09:36:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 09:36:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-28 09:36:04,818 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-28 09:36:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:36:04,819 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-28 09:36:04,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:36:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-28 09:36:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:36:04,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:36:04,821 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:36:04,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:36:04,821 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:36:04,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:36:04,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2015248137, now seen corresponding path program 8 times [2020-10-28 09:36:04,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:36:04,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235222694] [2020-10-28 09:36:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:36:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 09:36:04,838 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 09:36:04,839 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 09:36:04,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:36:04,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:36:04 BoogieIcfgContainer [2020-10-28 09:36:04,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 09:36:04,865 INFO L168 Benchmark]: Toolchain (without parser) took 7896.41 ms. Allocated memory was 159.4 MB in the beginning and 230.7 MB in the end (delta: 71.3 MB). Free memory was 134.2 MB in the beginning and 175.6 MB in the end (delta: -41.4 MB). Peak memory consumption was 31.6 MB. Max. memory is 8.0 GB. [2020-10-28 09:36:04,865 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 09:36:04,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.14 ms. Allocated memory is still 159.4 MB. Free memory was 133.5 MB in the beginning and 123.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 09:36:04,867 INFO L168 Benchmark]: Boogie Preprocessor took 44.67 ms. Allocated memory is still 159.4 MB. Free memory was 123.5 MB in the beginning and 122.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 09:36:04,868 INFO L168 Benchmark]: RCFGBuilder took 400.51 ms. Allocated memory is still 159.4 MB. Free memory was 122.1 MB in the beginning and 109.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 09:36:04,869 INFO L168 Benchmark]: TraceAbstraction took 7176.04 ms. Allocated memory was 159.4 MB in the beginning and 230.7 MB in the end (delta: 71.3 MB). Free memory was 109.1 MB in the beginning and 175.6 MB in the end (delta: -66.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 8.0 GB. [2020-10-28 09:36:04,872 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.14 ms. Allocated memory is still 159.4 MB. Free memory was 133.5 MB in the beginning and 123.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.67 ms. Allocated memory is still 159.4 MB. Free memory was 123.5 MB in the beginning and 122.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 400.51 ms. Allocated memory is still 159.4 MB. Free memory was 122.1 MB in the beginning and 109.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7176.04 ms. Allocated memory was 159.4 MB in the beginning and 230.7 MB in the end (delta: 71.3 MB). Free memory was 109.1 MB in the beginning and 175.6 MB in the end (delta: -66.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 23, overapproximation of bitwiseAnd at line 24. Possible FailurePath: [L16] unsigned char x = __VERIFIER_nondet_uchar(); [L17] unsigned char y; [L18] unsigned char c; [L20] y = 0 [L21] c = 0 [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND FALSE !(c < (unsigned char)8) [L30] CALL __VERIFIER_assert(x == y) [L7] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "num_conversion_2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.9s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 307 SDslu, 181 SDs, 0 SdLazy, 721 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, 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, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 34395 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/196 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...