/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/float-benchs/drift_tenth.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:22:42,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:22:42,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:22:42,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:22:42,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:22:42,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:22:42,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:22:42,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:22:42,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:22:42,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:22:42,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:22:42,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:22:42,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:22:42,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:22:42,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:22:42,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:22:42,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:22:42,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:22:42,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:22:42,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:22:42,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:22:42,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:22:42,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:22:42,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:22:42,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:22:42,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:22:42,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:22:42,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:22:42,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:22:42,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:22:42,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:22:42,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:22:42,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:22:42,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:22:42,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:22:42,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:22:42,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:22:42,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:22:42,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:22:42,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:22:42,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:22:42,431 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 14:22:42,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:22:42,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:22:42,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:22:42,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:22:42,464 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:22:42,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:22:42,465 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:22:42,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:22:42,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:22:42,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:22:42,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:22:42,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:22:42,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:22:42,467 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:22:42,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:22:42,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:22:42,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:22:42,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:22:42,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:22:42,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:22:42,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:22:42,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:22:42,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:22:42,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:22:42,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:22:42,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:22:42,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:22:42,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:22:42,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:22:42,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:22:42,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:22:43,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:22:43,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:22:43,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:22:43,047 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:22:43,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/drift_tenth.c [2020-10-28 14:22:43,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc2b62c0/9315a4e521f0438d81e081123becce09/FLAGe689350b2 [2020-10-28 14:22:43,804 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:22:43,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/drift_tenth.c [2020-10-28 14:22:43,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc2b62c0/9315a4e521f0438d81e081123becce09/FLAGe689350b2 [2020-10-28 14:22:44,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc2b62c0/9315a4e521f0438d81e081123becce09 [2020-10-28 14:22:44,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:22:44,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:22:44,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:22:44,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:22:44,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:22:44,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139d6ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44, skipping insertion in model container [2020-10-28 14:22:44,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:22:44,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:22:44,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:22:44,566 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:22:44,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:22:44,615 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:22:44,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44 WrapperNode [2020-10-28 14:22:44,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:22:44,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:22:44,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:22:44,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:22:44,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (1/1) ... [2020-10-28 14:22:44,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:22:44,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:22:44,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:22:44,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:22:44,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (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 14:22:44,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:22:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:22:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:22:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:22:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:22:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:22:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:22:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:22:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:22:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:22:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:22:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:22:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:22:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:22:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:22:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:22:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:22:45,048 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:22:45,049 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:22:45,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:22:45 BoogieIcfgContainer [2020-10-28 14:22:45,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:22:45,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:22:45,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:22:45,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:22:45,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:22:44" (1/3) ... [2020-10-28 14:22:45,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fedff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:22:45, skipping insertion in model container [2020-10-28 14:22:45,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:22:44" (2/3) ... [2020-10-28 14:22:45,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fedff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:22:45, skipping insertion in model container [2020-10-28 14:22:45,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:22:45" (3/3) ... [2020-10-28 14:22:45,063 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c [2020-10-28 14:22:45,078 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:22:45,084 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:22:45,101 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:22:45,135 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:22:45,136 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:22:45,136 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:22:45,136 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:22:45,136 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:22:45,136 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:22:45,136 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:22:45,137 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:22:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 14:22:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:22:45,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:45,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:45,166 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:45,175 INFO L82 PathProgramCache]: Analyzing trace with hash 943003376, now seen corresponding path program 1 times [2020-10-28 14:22:45,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:45,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793429123] [2020-10-28 14:22:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:45,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:45,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:45,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:22:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 14:22:45,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:45,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:22:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:45,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:22:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:45,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:45,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:45,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:45,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:45,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:22:45,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:45,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:22:45,700 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 14:22:45,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793429123] [2020-10-28 14:22:45,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:22:45,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:22:45,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156975166] [2020-10-28 14:22:45,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:22:45,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:22:45,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:22:45,748 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-28 14:22:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:45,971 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-28 14:22:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:22:45,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:22:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:45,983 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:22:45,983 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 14:22:45,987 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 14:22:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 14:22:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 14:22:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 14:22:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-28 14:22:46,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-28 14:22:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:46,040 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-28 14:22:46,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:22:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-28 14:22:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:22:46,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:46,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:46,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:22:46,042 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:46,044 INFO L82 PathProgramCache]: Analyzing trace with hash 771228470, now seen corresponding path program 1 times [2020-10-28 14:22:46,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:46,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951575103] [2020-10-28 14:22:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:46,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:46,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:46,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:22:46,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:46,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 14:22:46,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:46,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:22:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:22:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:22:46,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:46,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:46,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:46,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:46,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:22:46,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:46,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:46,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:22:46,368 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 14:22:46,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951575103] [2020-10-28 14:22:46,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:22:46,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:22:46,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664736990] [2020-10-28 14:22:46,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:22:46,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:22:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:22:46,374 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-10-28 14:22:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:46,474 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-28 14:22:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:22:46,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:22:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:46,476 INFO L225 Difference]: With dead ends: 22 [2020-10-28 14:22:46,476 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 14:22:46,478 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 14:22:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 14:22:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-28 14:22:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:22:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 14:22:46,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-28 14:22:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:46,488 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 14:22:46,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:22:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 14:22:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:22:46,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:46,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:46,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:22:46,490 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:46,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1042690312, now seen corresponding path program 1 times [2020-10-28 14:22:46,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:46,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908510611] [2020-10-28 14:22:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:46,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:46,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:46,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:22:46,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:46,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 14:22:46,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:46,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:46,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:22:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:22:46,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:22:46,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:46,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:46,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:46,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:46,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:46,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:22:46,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:46,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:46,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:22:46,749 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 14:22:46,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908510611] [2020-10-28 14:22:46,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:46,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:22:46,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258240358] [2020-10-28 14:22:46,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:22:46,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:22:46,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:22:46,752 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-28 14:22:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:46,934 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 14:22:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:22:46,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 14:22:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:46,936 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:22:46,936 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:22:46,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:22:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:22:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-28 14:22:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:22:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 14:22:46,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-28 14:22:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:46,946 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 14:22:46,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:22:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 14:22:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:22:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:46,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:46,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:22:46,948 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash -461917638, now seen corresponding path program 2 times [2020-10-28 14:22:46,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:46,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778026616] [2020-10-28 14:22:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:46,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:47,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:47,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:22:47,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:47,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-28 14:22:47,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:47,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:22:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:22:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:22:47,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:47,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:47,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:47,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:47,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:22:47,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:47,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:22:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:47,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778026616] [2020-10-28 14:22:47,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:47,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:22:47,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848824188] [2020-10-28 14:22:47,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:22:47,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:47,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:22:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:22:47,168 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-28 14:22:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:47,383 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 14:22:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:22:47,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:22:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:47,385 INFO L225 Difference]: With dead ends: 26 [2020-10-28 14:22:47,385 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:22:47,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:22:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:22:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-28 14:22:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:22:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-28 14:22:47,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-28 14:22:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:47,393 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-28 14:22:47,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:22:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-28 14:22:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:22:47,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:47,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:47,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:22:47,395 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash -685126404, now seen corresponding path program 3 times [2020-10-28 14:22:47,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:47,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653135273] [2020-10-28 14:22:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:47,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:47,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-28 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:22:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:22:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:22:47,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:47,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:47,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:47,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:47,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:47,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:22:47,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:47,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:47,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:22:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:47,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653135273] [2020-10-28 14:22:47,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:47,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:22:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717496915] [2020-10-28 14:22:47,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:22:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:22:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:22:47,606 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-28 14:22:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:47,857 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 14:22:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:22:47,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-28 14:22:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:47,859 INFO L225 Difference]: With dead ends: 28 [2020-10-28 14:22:47,859 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 14:22:47,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:22:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 14:22:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-28 14:22:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:22:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-28 14:22:47,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-28 14:22:47,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:47,868 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-28 14:22:47,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:22:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-28 14:22:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:22:47,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:47,869 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:47,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:22:47,870 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash -440385730, now seen corresponding path program 4 times [2020-10-28 14:22:47,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:47,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331676155] [2020-10-28 14:22:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:47,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:48,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:48,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:22:48,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:48,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-28 14:22:48,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:48,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:48,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:22:48,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:48,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:22:48,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:48,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:48,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:48,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:48,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:48,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:48,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:22:48,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:48,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:48,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:48,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331676155] [2020-10-28 14:22:48,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:48,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:22:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635757001] [2020-10-28 14:22:48,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:22:48,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:48,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:22:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:22:48,133 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-28 14:22:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:48,396 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 14:22:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:22:48,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 14:22:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:48,401 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:22:48,402 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:22:48,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:22:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:22:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 14:22:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:22:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-28 14:22:48,412 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-28 14:22:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:48,413 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-28 14:22:48,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:22:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-28 14:22:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:22:48,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:48,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:48,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:22:48,415 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1467799296, now seen corresponding path program 5 times [2020-10-28 14:22:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:48,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398049425] [2020-10-28 14:22:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:48,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:48,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:48,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:22:48,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-28 14:22:48,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:48,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:22:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:22:48,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:48,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:48,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:48,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:48,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:48,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:22:48,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:48,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:48,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:48,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:48,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:48,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:48,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398049425] [2020-10-28 14:22:48,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:48,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:22:48,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230180450] [2020-10-28 14:22:48,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:22:48,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:22:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:22:48,671 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-28 14:22:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:48,983 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 14:22:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:22:48,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:22:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:48,984 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:22:48,984 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 14:22:48,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:22:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 14:22:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-28 14:22:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:22:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-28 14:22:48,991 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-28 14:22:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:48,992 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-28 14:22:48,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:22:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-28 14:22:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:22:48,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:48,993 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:48,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:22:48,993 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:48,994 INFO L82 PathProgramCache]: Analyzing trace with hash -969758142, now seen corresponding path program 6 times [2020-10-28 14:22:48,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:48,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531868404] [2020-10-28 14:22:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:49,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:49,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:22:49,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:49,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 14:22:49,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:49,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:22:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:49,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:22:49,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:49,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:49,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:49,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:49,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:49,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:49,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:22:49,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:49,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:49,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:49,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:49,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:49,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531868404] [2020-10-28 14:22:49,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:49,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:22:49,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581585153] [2020-10-28 14:22:49,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:22:49,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:22:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:22:49,201 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-28 14:22:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:49,526 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 14:22:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:22:49,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-28 14:22:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:49,527 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:22:49,527 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:22:49,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:22:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:22:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-28 14:22:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:22:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-28 14:22:49,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-28 14:22:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:49,535 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-28 14:22:49,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:22:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-28 14:22:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:22:49,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:49,536 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:49,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:22:49,536 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash 906420996, now seen corresponding path program 7 times [2020-10-28 14:22:49,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:49,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572838787] [2020-10-28 14:22:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:49,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:49,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:49,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:22:49,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:49,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 14:22:49,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:49,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:22:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:22:49,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:22:49,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:49,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:49,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:49,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:49,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:49,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:22:49,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:49,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:49,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:49,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572838787] [2020-10-28 14:22:49,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:49,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:22:49,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945836099] [2020-10-28 14:22:49,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:22:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:22:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:22:49,801 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-28 14:22:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:50,189 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 14:22:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:22:50,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-28 14:22:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:50,190 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:22:50,192 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:22:50,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:22:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:22:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-28 14:22:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:22:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-28 14:22:50,202 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-28 14:22:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:50,202 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-28 14:22:50,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:22:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-28 14:22:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:22:50,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:50,203 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:50,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:22:50,203 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash 28308294, now seen corresponding path program 8 times [2020-10-28 14:22:50,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:50,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401945770] [2020-10-28 14:22:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:50,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:50,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:50,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:22:50,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:50,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 14:22:50,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:50,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:50,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:22:50,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:50,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:22:50,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:50,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:50,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:50,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:50,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:50,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:50,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:22:50,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:50,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:50,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:50,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401945770] [2020-10-28 14:22:50,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:50,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:22:50,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311455374] [2020-10-28 14:22:50,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:22:50,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:50,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:22:50,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:22:50,540 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-28 14:22:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:50,941 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-28 14:22:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:22:50,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-28 14:22:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:50,943 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:22:50,943 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:22:50,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:22:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:22:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-28 14:22:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:22:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-28 14:22:50,954 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-28 14:22:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:50,954 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-28 14:22:50,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:22:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-28 14:22:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:22:50,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:50,960 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:50,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:22:50,960 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:50,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2024408312, now seen corresponding path program 9 times [2020-10-28 14:22:50,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:50,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005201758] [2020-10-28 14:22:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:51,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:51,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:22:51,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:51,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 14:22:51,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:51,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:51,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:22:51,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:22:51,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:22:51,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:51,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:22:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:22:51,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:22:51,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:22:51,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:22:51,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:22:51,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:22:51,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:22:51,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:22:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:22:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:22:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:22:51,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:22:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:22:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005201758] [2020-10-28 14:22:51,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:22:51,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:22:51,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463516421] [2020-10-28 14:22:51,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:22:51,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:22:51,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:22:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:22:51,241 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-28 14:22:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:22:51,710 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-28 14:22:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:22:51,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-28 14:22:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:22:51,711 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:22:51,711 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:22:51,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:22:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:22:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 14:22:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:22:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-28 14:22:51,726 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-28 14:22:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:22:51,727 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-28 14:22:51,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:22:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-28 14:22:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:22:51,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:22:51,729 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:22:51,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:22:51,729 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:22:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:22:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash 999889482, now seen corresponding path program 10 times [2020-10-28 14:22:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:22:51,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86436544] [2020-10-28 14:22:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:22:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:22:51,752 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:22:51,752 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:22:51,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:22:51,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:22:51 BoogieIcfgContainer [2020-10-28 14:22:51,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:22:51,778 INFO L168 Benchmark]: Toolchain (without parser) took 7591.58 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.5 MB in the beginning and 105.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 88.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:22:51,779 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:22:51,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 420.33 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:22:51,786 INFO L168 Benchmark]: Boogie Preprocessor took 74.41 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:22:51,786 INFO L168 Benchmark]: RCFGBuilder took 356.80 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 102.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:22:51,789 INFO L168 Benchmark]: TraceAbstraction took 6721.46 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.6 MB in the beginning and 105.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 64.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:22:51,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 420.33 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 115.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.41 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.80 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 102.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6721.46 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.6 MB in the beginning and 105.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 64.5 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 someBinaryDOUBLEComparisonOperation at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 15. Possible FailurePath: [L10] float tick = 1.f / 10.f; [L11] float time = 0.f; [L12] int i; [L14] i = 0 [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND FALSE !(i < 10) [L17] CALL __VERIFIER_assert(time != 1.0) [L6] COND TRUE !(cond) [L6] CALL reach_error() [L3] __assert_fail("0", "drift_tenth.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.6s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 190 SDslu, 227 SDs, 0 SdLazy, 323 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 254 NumberOfCodeBlocks, 254 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 211 ConstructedInterpolants, 0 QuantifiedInterpolants, 15441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 0/285 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...