/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:04,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:04,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:04,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:04,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:04,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:04,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:04,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:04,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:04,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:04,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:04,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:04,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:04,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:04,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:04,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:04,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:04,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:04,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:04,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:04,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:04,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:04,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:04,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:04,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:04,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 06:34:04,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 06:34:04,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 06:34:04,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 06:34:04,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 06:34:04,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 06:34:04,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 06:34:04,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 06:34:04,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:04,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:04,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:04,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:34:04,477 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:04,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:04,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:04,479 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:04,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:04,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:04,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:04,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:04,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:04,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:04,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:04,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:04,481 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:04,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:04,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:04,482 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:04,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:04,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:04,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:04,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:04,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:04,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:04,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:04,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:04,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:04,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:04,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:04,865 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:04,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-11-07 06:34:04,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8f7d8c5/b380120a816a4842b4d7a92a187adcde/FLAGeaf671921 [2020-11-07 06:34:05,631 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:05,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-11-07 06:34:05,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8f7d8c5/b380120a816a4842b4d7a92a187adcde/FLAGeaf671921 [2020-11-07 06:34:06,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8f7d8c5/b380120a816a4842b4d7a92a187adcde [2020-11-07 06:34:06,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:06,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:06,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:06,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:06,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:06,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46cbf26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06, skipping insertion in model container [2020-11-07 06:34:06,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:06,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:06,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:06,266 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:06,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:06,305 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:06,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06 WrapperNode [2020-11-07 06:34:06,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:06,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:06,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:06,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:06,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:06,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:06,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:06,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:06,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (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 [2020-11-07 06:34:06,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:06,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:06,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:06,438 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:06,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:06,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:06,440 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:06,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:06,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:06,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:06,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:06,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:06,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:06,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:06,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:06,798 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:06,798 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 06:34:06,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:06 BoogieIcfgContainer [2020-11-07 06:34:06,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:06,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:06,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:06,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:06,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:06" (1/3) ... [2020-11-07 06:34:06,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e176d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:06, skipping insertion in model container [2020-11-07 06:34:06,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (2/3) ... [2020-11-07 06:34:06,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e176d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:06, skipping insertion in model container [2020-11-07 06:34:06,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:06" (3/3) ... [2020-11-07 06:34:06,809 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-11-07 06:34:06,827 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:06,830 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:06,843 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:06,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:06,867 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:06,868 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:06,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:06,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:06,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:06,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:06,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-11-07 06:34:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:34:06,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:06,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:06,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-11-07 06:34:06,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:06,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436629793] [2020-11-07 06:34:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:07,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436629793] [2020-11-07 06:34:07,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:07,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:34:07,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049045456] [2020-11-07 06:34:07,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:34:07,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:34:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:07,283 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-11-07 06:34:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:07,471 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-11-07 06:34:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:34:07,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-11-07 06:34:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:07,481 INFO L225 Difference]: With dead ends: 111 [2020-11-07 06:34:07,481 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 06:34:07,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 06:34:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-07 06:34:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 06:34:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-11-07 06:34:07,535 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-11-07 06:34:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:07,536 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-11-07 06:34:07,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:34:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-11-07 06:34:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:34:07,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:07,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:07,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:07,539 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-11-07 06:34:07,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:07,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742903823] [2020-11-07 06:34:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:07,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742903823] [2020-11-07 06:34:07,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:07,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:07,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81750052] [2020-11-07 06:34:07,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:07,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:07,768 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-11-07 06:34:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:08,047 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-11-07 06:34:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:08,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-11-07 06:34:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:08,050 INFO L225 Difference]: With dead ends: 88 [2020-11-07 06:34:08,050 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 06:34:08,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 06:34:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-11-07 06:34:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-07 06:34:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-07 06:34:08,067 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-11-07 06:34:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:08,068 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-07 06:34:08,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-07 06:34:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 06:34:08,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:08,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:08,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:08,071 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-11-07 06:34:08,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:08,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145864454] [2020-11-07 06:34:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:34:08,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145864454] [2020-11-07 06:34:08,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:08,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 06:34:08,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271118191] [2020-11-07 06:34:08,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:34:08,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:34:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:34:08,285 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 8 states. [2020-11-07 06:34:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:08,584 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-11-07 06:34:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:34:08,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-11-07 06:34:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:08,587 INFO L225 Difference]: With dead ends: 73 [2020-11-07 06:34:08,587 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 06:34:08,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:34:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 06:34:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-11-07 06:34:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:34:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-11-07 06:34:08,600 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2020-11-07 06:34:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:08,601 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-11-07 06:34:08,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:34:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-11-07 06:34:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 06:34:08,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:08,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:08,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:08,603 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash -20855722, now seen corresponding path program 1 times [2020-11-07 06:34:08,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:08,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148710653] [2020-11-07 06:34:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:08,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148710653] [2020-11-07 06:34:08,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:08,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:34:08,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357731604] [2020-11-07 06:34:08,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:34:08,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:08,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:34:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:34:08,754 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 10 states. [2020-11-07 06:34:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:09,079 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-11-07 06:34:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 06:34:09,079 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-11-07 06:34:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:09,081 INFO L225 Difference]: With dead ends: 101 [2020-11-07 06:34:09,081 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 06:34:09,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:34:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 06:34:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-11-07 06:34:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 06:34:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-11-07 06:34:09,094 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-11-07 06:34:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:09,095 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-11-07 06:34:09,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:34:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-11-07 06:34:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 06:34:09,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:09,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:09,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:34:09,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1036949453, now seen corresponding path program 2 times [2020-11-07 06:34:09,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:09,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070762557] [2020-11-07 06:34:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 06:34:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070762557] [2020-11-07 06:34:09,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:34:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952880767] [2020-11-07 06:34:09,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:34:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:34:09,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:09,292 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 6 states. [2020-11-07 06:34:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:09,472 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-11-07 06:34:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:34:09,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-11-07 06:34:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:09,474 INFO L225 Difference]: With dead ends: 101 [2020-11-07 06:34:09,474 INFO L226 Difference]: Without dead ends: 69 [2020-11-07 06:34:09,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:34:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-07 06:34:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-11-07 06:34:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 06:34:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-11-07 06:34:09,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-11-07 06:34:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:09,487 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-11-07 06:34:09,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:34:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-11-07 06:34:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 06:34:09,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:09,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:09,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:34:09,489 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1144764371, now seen corresponding path program 1 times [2020-11-07 06:34:09,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:09,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771960005] [2020-11-07 06:34:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771960005] [2020-11-07 06:34:10,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:10,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 06:34:10,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178461415] [2020-11-07 06:34:10,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 06:34:10,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 06:34:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:34:10,338 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 25 states. [2020-11-07 06:34:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:13,025 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-11-07 06:34:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 06:34:13,025 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-11-07 06:34:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:13,029 INFO L225 Difference]: With dead ends: 138 [2020-11-07 06:34:13,029 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 06:34:13,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:34:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 06:34:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2020-11-07 06:34:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-07 06:34:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-11-07 06:34:13,052 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 64 [2020-11-07 06:34:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:13,053 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-11-07 06:34:13,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 06:34:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-11-07 06:34:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 06:34:13,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:13,055 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:13,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:34:13,055 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:13,056 INFO L82 PathProgramCache]: Analyzing trace with hash -285303196, now seen corresponding path program 2 times [2020-11-07 06:34:13,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:13,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938877414] [2020-11-07 06:34:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:13,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938877414] [2020-11-07 06:34:13,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:13,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:34:13,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478786808] [2020-11-07 06:34:13,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:34:13,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:34:13,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:34:13,284 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 14 states. [2020-11-07 06:34:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:14,050 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2020-11-07 06:34:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 06:34:14,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-11-07 06:34:14,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:14,053 INFO L225 Difference]: With dead ends: 139 [2020-11-07 06:34:14,053 INFO L226 Difference]: Without dead ends: 117 [2020-11-07 06:34:14,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:34:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-07 06:34:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2020-11-07 06:34:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-07 06:34:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-11-07 06:34:14,093 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-11-07 06:34:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:14,093 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-11-07 06:34:14,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:34:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-11-07 06:34:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-07 06:34:14,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:14,096 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:14,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:34:14,097 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash 84138786, now seen corresponding path program 3 times [2020-11-07 06:34:14,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:14,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145983934] [2020-11-07 06:34:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:14,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145983934] [2020-11-07 06:34:14,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:14,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:34:14,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879449013] [2020-11-07 06:34:14,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:34:14,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:14,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:34:14,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:34:14,315 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 14 states. [2020-11-07 06:34:14,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:14,819 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-11-07 06:34:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 06:34:14,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-11-07 06:34:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:14,821 INFO L225 Difference]: With dead ends: 136 [2020-11-07 06:34:14,821 INFO L226 Difference]: Without dead ends: 86 [2020-11-07 06:34:14,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:34:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-07 06:34:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-11-07 06:34:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 06:34:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-11-07 06:34:14,854 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-11-07 06:34:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:14,854 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-11-07 06:34:14,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:34:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-11-07 06:34:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-07 06:34:14,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:14,856 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:14,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:34:14,861 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:14,862 INFO L82 PathProgramCache]: Analyzing trace with hash -923985767, now seen corresponding path program 4 times [2020-11-07 06:34:14,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:14,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944531241] [2020-11-07 06:34:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:14,921 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:14,961 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:15,010 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:34:15,011 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:15,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:34:15,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:15 BoogieIcfgContainer [2020-11-07 06:34:15,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:15,143 INFO L168 Benchmark]: Toolchain (without parser) took 9114.09 ms. Allocated memory was 164.6 MB in the beginning and 248.5 MB in the end (delta: 83.9 MB). Free memory was 140.4 MB in the beginning and 117.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 108.2 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,144 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 164.6 MB. Free memory is still 138.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:15,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.14 ms. Allocated memory is still 164.6 MB. Free memory was 139.8 MB in the beginning and 130.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,149 INFO L168 Benchmark]: Boogie Preprocessor took 43.59 ms. Allocated memory is still 164.6 MB. Free memory was 130.0 MB in the beginning and 128.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,150 INFO L168 Benchmark]: RCFGBuilder took 446.64 ms. Allocated memory is still 164.6 MB. Free memory was 128.3 MB in the beginning and 144.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,151 INFO L168 Benchmark]: TraceAbstraction took 8337.02 ms. Allocated memory was 164.6 MB in the beginning and 248.5 MB in the end (delta: 83.9 MB). Free memory was 144.4 MB in the beginning and 117.3 MB in the end (delta: 27.1 MB). Peak memory consumption was 111.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:15,158 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 164.6 MB. Free memory is still 138.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.14 ms. Allocated memory is still 164.6 MB. Free memory was 139.8 MB in the beginning and 130.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.59 ms. Allocated memory is still 164.6 MB. Free memory was 130.0 MB in the beginning and 128.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 446.64 ms. Allocated memory is still 164.6 MB. Free memory was 128.3 MB in the beginning and 144.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8337.02 ms. Allocated memory was 164.6 MB in the beginning and 248.5 MB in the end (delta: 83.9 MB). Free memory was 144.4 MB in the beginning and 117.3 MB in the end (delta: 27.1 MB). Peak memory consumption was 111.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=3, N=3] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L27] int i; VAL [\old(N)=0, N=3] [L28] long long sum[1]; VAL [\old(N)=0, N=3, sum={3:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=3, sum={3:0}] [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=3, sum={3:0}] [L31] COND TRUE i