/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:08:42,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:08:42,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:08:42,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:08:42,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:08:42,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:08:42,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:08:42,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:08:42,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:08:42,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:08:42,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:08:42,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:08:42,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:08:42,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:08:42,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:08:42,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:08:42,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:08:42,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:08:42,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:08:42,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:08:42,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:08:42,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:08:42,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:08:42,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:08:42,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:08:42,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:08:42,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:08:42,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:08:42,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:08:42,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:08:42,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:08:42,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:08:42,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:08:42,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:08:42,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:08:42,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:08:42,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:08:42,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:08:42,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:08:42,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:08:42,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:08:42,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:08:42,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:08:42,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:08:42,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:08:42,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:08:42,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:08:42,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:08:42,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:08:42,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:08:42,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:08:42,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:08:42,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:08:42,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:08:42,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:08:42,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:08:42,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:08:42,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:08:42,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:08:42,140 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:08:42,140 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:08:42,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:08:42,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:08:42,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:08:42,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:08:42,482 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:08:42,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-04-16 08:08:42,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65744b941/60851f58f3d64b9b8d5863d5bc5b5e25/FLAG63c376e24 [2021-04-16 08:08:43,046 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:08:43,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-04-16 08:08:43,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65744b941/60851f58f3d64b9b8d5863d5bc5b5e25/FLAG63c376e24 [2021-04-16 08:08:43,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65744b941/60851f58f3d64b9b8d5863d5bc5b5e25 [2021-04-16 08:08:43,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:08:43,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:08:43,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:08:43,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:08:43,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:08:43,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e60af2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43, skipping insertion in model container [2021-04-16 08:08:43,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:08:43,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:08:43,576 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c[546,559] [2021-04-16 08:08:43,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:08:43,598 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:08:43,610 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c[546,559] [2021-04-16 08:08:43,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:08:43,629 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:08:43,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43 WrapperNode [2021-04-16 08:08:43,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:08:43,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:08:43,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:08:43,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:08:43,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... [2021-04-16 08:08:43,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:08:43,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:08:43,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:08:43,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:08:43,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-04-16 08:08:43,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:08:43,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:08:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:08:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:08:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:08:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:08:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:08:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:08:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:08:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:08:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-04-16 08:08:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:08:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:08:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:08:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:08:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:08:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:08:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:08:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:08:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:08:44,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:08:44,140 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 08:08:44,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:08:44 BoogieIcfgContainer [2021-04-16 08:08:44,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:08:44,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:08:44,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:08:44,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:08:44,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:08:43" (1/3) ... [2021-04-16 08:08:44,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6022df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:08:44, skipping insertion in model container [2021-04-16 08:08:44,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:43" (2/3) ... [2021-04-16 08:08:44,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6022df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:08:44, skipping insertion in model container [2021-04-16 08:08:44,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:08:44" (3/3) ... [2021-04-16 08:08:44,154 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2021-04-16 08:08:44,160 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:08:44,172 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:08:44,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:08:44,218 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:08:44,218 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:08:44,218 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:08:44,219 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:08:44,219 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:08:44,219 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:08:44,219 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:08:44,219 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:08:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-04-16 08:08:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:08:44,249 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:44,250 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:44,250 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-04-16 08:08:44,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:44,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496218165] [2021-04-16 08:08:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:44,332 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:44,490 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:44,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:44,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:44,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:44,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:44,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:44,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496218165] [2021-04-16 08:08:44,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:44,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:08:44,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227934195] [2021-04-16 08:08:44,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:08:44,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:08:44,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:08:44,642 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:08:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:44,881 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-04-16 08:08:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:08:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-04-16 08:08:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:44,889 INFO L225 Difference]: With dead ends: 69 [2021-04-16 08:08:44,889 INFO L226 Difference]: Without dead ends: 33 [2021-04-16 08:08:44,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:08:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-16 08:08:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-16 08:08:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-04-16 08:08:44,941 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-04-16 08:08:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:44,942 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-04-16 08:08:44,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:08:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-04-16 08:08:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:08:44,944 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:44,945 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:44,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:08:44,945 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-04-16 08:08:44,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:44,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269065239] [2021-04-16 08:08:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:44,950 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:08:45,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:45,051 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:45,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:45,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269065239] [2021-04-16 08:08:45,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:45,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:08:45,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35825392] [2021-04-16 08:08:45,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:08:45,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:45,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:08:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:08:45,141 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-04-16 08:08:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:45,556 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-04-16 08:08:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-16 08:08:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-04-16 08:08:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:45,559 INFO L225 Difference]: With dead ends: 46 [2021-04-16 08:08:45,559 INFO L226 Difference]: Without dead ends: 44 [2021-04-16 08:08:45,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 08:08:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-04-16 08:08:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-04-16 08:08:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-04-16 08:08:45,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-04-16 08:08:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:45,600 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-04-16 08:08:45,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-04-16 08:08:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-04-16 08:08:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:08:45,602 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:45,602 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:45,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:08:45,602 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:45,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-04-16 08:08:45,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:45,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908907503] [2021-04-16 08:08:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:45,618 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,692 INFO L142 QuantifierPusher]: treesize reduction 13, result has 40.9 percent of original size [2021-04-16 08:08:45,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 08:08:45,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:45,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:45,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-04-16 08:08:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:45,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:45,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:45,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908907503] [2021-04-16 08:08:45,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:45,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:08:45,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69713181] [2021-04-16 08:08:45,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:08:45,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:45,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:08:45,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:08:45,823 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:08:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:46,220 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-04-16 08:08:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-16 08:08:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-04-16 08:08:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:46,223 INFO L225 Difference]: With dead ends: 50 [2021-04-16 08:08:46,223 INFO L226 Difference]: Without dead ends: 48 [2021-04-16 08:08:46,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 08:08:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-04-16 08:08:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-04-16 08:08:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-04-16 08:08:46,253 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-04-16 08:08:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:46,255 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-04-16 08:08:46,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:08:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-04-16 08:08:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-16 08:08:46,257 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:46,258 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:46,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:08:46,258 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-04-16 08:08:46,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:46,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125252770] [2021-04-16 08:08:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:46,263 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:46,293 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:08:46,294 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:08:46,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:08:46,320 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:08:46,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:08:46 BoogieIcfgContainer [2021-04-16 08:08:46,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:08:46,325 INFO L168 Benchmark]: Toolchain (without parser) took 2880.37 ms. Allocated memory was 185.6 MB in the beginning and 224.4 MB in the end (delta: 38.8 MB). Free memory was 151.8 MB in the beginning and 173.2 MB in the end (delta: -21.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:46,330 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 185.6 MB. Free memory was 168.5 MB in the beginning and 168.4 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:08:46,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.84 ms. Allocated memory is still 185.6 MB. Free memory was 151.6 MB in the beginning and 141.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:46,331 INFO L168 Benchmark]: Boogie Preprocessor took 84.42 ms. Allocated memory is still 185.6 MB. Free memory was 141.8 MB in the beginning and 169.3 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:46,333 INFO L168 Benchmark]: RCFGBuilder took 425.85 ms. Allocated memory is still 185.6 MB. Free memory was 169.3 MB in the beginning and 153.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:46,333 INFO L168 Benchmark]: TraceAbstraction took 2179.75 ms. Allocated memory was 185.6 MB in the beginning and 224.4 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 173.2 MB in the end (delta: -20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:46,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 185.6 MB. Free memory was 168.5 MB in the beginning and 168.4 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 178.84 ms. Allocated memory is still 185.6 MB. Free memory was 151.6 MB in the beginning and 141.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.42 ms. Allocated memory is still 185.6 MB. Free memory was 141.8 MB in the beginning and 169.3 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.85 ms. Allocated memory is still 185.6 MB. Free memory was 169.3 MB in the beginning and 153.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2179.75 ms. Allocated memory was 185.6 MB in the beginning and 224.4 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 173.2 MB in the end (delta: -20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] long long r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(A>=0 && A<=50) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=50) [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B>=0 && B<=50) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=50) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2091.2ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 20.7ms, AutomataDifference: 1086.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 97 SDtfs, 92 SDslu, 77 SDs, 0 SdLazy, 233 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 475.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 485.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 99.0ms AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...