/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:19:47,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:19:47,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:19:47,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:19:47,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:19:47,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:19:47,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:19:47,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:19:47,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:19:47,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:19:47,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:19:47,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:19:47,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:19:47,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:19:47,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:19:47,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:19:47,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:19:47,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:19:47,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:19:47,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:19:47,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:19:47,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:19:47,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:19:47,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:19:47,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:19:47,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:19:47,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:19:47,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:19:47,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:19:47,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:19:47,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:19:47,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:19:47,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:19:47,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:19:47,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:19:47,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:19:47,227 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:19:47,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:19:47,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:19:47,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:19:47,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:19:47,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:19:47,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:19:47,229 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:19:47,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:19:47,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:19:47,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:19:47,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:19:47,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:19:47,682 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:19:47,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2021-02-22 02:19:47,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd5e43eb/8afaedb5c70041c7a0dfb99cbefc000d/FLAG33ef0d8a2 [2021-02-22 02:19:48,464 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:19:48,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2021-02-22 02:19:48,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd5e43eb/8afaedb5c70041c7a0dfb99cbefc000d/FLAG33ef0d8a2 [2021-02-22 02:19:48,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd5e43eb/8afaedb5c70041c7a0dfb99cbefc000d [2021-02-22 02:19:48,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:19:48,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:19:48,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:48,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:19:48,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:19:48,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ea6ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48, skipping insertion in model container [2021-02-22 02:19:48,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:19:48,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:19:49,109 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c[588,601] [2021-02-22 02:19:49,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:49,149 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:19:49,165 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c[588,601] [2021-02-22 02:19:49,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:49,224 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:19:49,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49 WrapperNode [2021-02-22 02:19:49,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:49,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:19:49,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:19:49,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:19:49,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:19:49,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:19:49,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:19:49,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:19:49,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (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 [2021-02-22 02:19:49,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:19:49,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:19:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:19:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:19:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:19:49,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:19:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:19:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:19:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:19:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:19:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:19:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:19:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:19:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:19:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:19:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:19:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:19:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:19:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:19:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:19:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:19:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:19:50,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:19:50,021 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:19:50,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:50 BoogieIcfgContainer [2021-02-22 02:19:50,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:19:50,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:19:50,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:19:50,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:19:50,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:19:48" (1/3) ... [2021-02-22 02:19:50,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627d41dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:50, skipping insertion in model container [2021-02-22 02:19:50,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (2/3) ... [2021-02-22 02:19:50,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627d41dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:50, skipping insertion in model container [2021-02-22 02:19:50,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:50" (3/3) ... [2021-02-22 02:19:50,034 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2021-02-22 02:19:50,041 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:19:50,047 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:19:50,069 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:19:50,105 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:19:50,105 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:19:50,105 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:19:50,106 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:19:50,106 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:19:50,106 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:19:50,106 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:19:50,106 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:19:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2021-02-22 02:19:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:50,145 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:50,147 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] [2021-02-22 02:19:50,147 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1589495831, now seen corresponding path program 1 times [2021-02-22 02:19:50,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:50,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126144971] [2021-02-22 02:19:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:50,268 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:19:50,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126144971] [2021-02-22 02:19:50,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:50,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:19:50,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319087374] [2021-02-22 02:19:50,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:19:50,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:19:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:19:50,632 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2021-02-22 02:19:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:50,838 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-02-22 02:19:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:19:50,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2021-02-22 02:19:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:50,856 INFO L225 Difference]: With dead ends: 107 [2021-02-22 02:19:50,856 INFO L226 Difference]: Without dead ends: 52 [2021-02-22 02:19:50,862 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 [2021-02-22 02:19:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-22 02:19:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-02-22 02:19:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-22 02:19:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-22 02:19:50,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-02-22 02:19:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:50,913 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-22 02:19:50,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:19:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-22 02:19:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:50,915 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:50,915 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] [2021-02-22 02:19:50,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:19:50,916 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1961847080, now seen corresponding path program 1 times [2021-02-22 02:19:50,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:50,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571585999] [2021-02-22 02:19:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:50,921 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:51,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:19:51,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:51,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:51,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:19:51,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571585999] [2021-02-22 02:19:51,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:51,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:19:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521571000] [2021-02-22 02:19:51,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:19:51,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:19:51,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:19:51,091 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 5 states. [2021-02-22 02:19:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:51,309 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-02-22 02:19:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:19:51,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-22 02:19:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:51,316 INFO L225 Difference]: With dead ends: 86 [2021-02-22 02:19:51,316 INFO L226 Difference]: Without dead ends: 61 [2021-02-22 02:19:51,321 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 [2021-02-22 02:19:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-22 02:19:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-02-22 02:19:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-22 02:19:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-02-22 02:19:51,353 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 35 [2021-02-22 02:19:51,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:51,354 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-02-22 02:19:51,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:19:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-02-22 02:19:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-22 02:19:51,359 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:51,359 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] [2021-02-22 02:19:51,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:19:51,360 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2023038414, now seen corresponding path program 1 times [2021-02-22 02:19:51,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:51,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824366954] [2021-02-22 02:19:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:51,447 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:19:51,473 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:19:51,487 WARN L141 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size [2021-02-22 02:19:51,488 WARN L147 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size 3 [2021-02-22 02:19:51,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:51,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:51,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,498 WARN L141 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-02-22 02:19:51,500 WARN L147 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size 19 [2021-02-22 02:19:51,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:51,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:51,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,521 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-22 02:19:51,524 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-22 02:19:51,524 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:19:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:51,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:51,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:19:51,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:51,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:19:51,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:19:51,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:19:51,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:19:51,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:51,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:51,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:19:51,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:19:51,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-22 02:19:51,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:51,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:19:51,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:51,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:19:51,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-22 02:19:51,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:51,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:19:51,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-22 02:19:51,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:51,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:19:51,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-02-22 02:19:52,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:52,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:52,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-22 02:19:52,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:52,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824366954] [2021-02-22 02:19:52,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:52,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-22 02:19:52,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118520135] [2021-02-22 02:19:52,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-22 02:19:52,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-22 02:19:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=193, Unknown=3, NotChecked=0, Total=240 [2021-02-22 02:19:52,098 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 16 states. [2021-02-22 02:19:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:52,787 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-02-22 02:19:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-22 02:19:52,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2021-02-22 02:19:52,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:52,789 INFO L225 Difference]: With dead ends: 108 [2021-02-22 02:19:52,790 INFO L226 Difference]: Without dead ends: 77 [2021-02-22 02:19:52,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=420, Unknown=3, NotChecked=0, Total=506 [2021-02-22 02:19:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-22 02:19:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-02-22 02:19:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-22 02:19:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-02-22 02:19:52,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 47 [2021-02-22 02:19:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:52,809 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-02-22 02:19:52,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-22 02:19:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-02-22 02:19:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-22 02:19:52,811 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:52,812 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] [2021-02-22 02:19:52,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:19:52,812 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1679168281, now seen corresponding path program 1 times [2021-02-22 02:19:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:52,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598897864] [2021-02-22 02:19:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:52,854 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:19:52,858 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:19:52,860 WARN L141 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size [2021-02-22 02:19:52,861 WARN L147 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size 3 [2021-02-22 02:19:52,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:52,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:52,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:52,869 WARN L141 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-02-22 02:19:52,871 WARN L147 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size 19 [2021-02-22 02:19:52,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:52,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:52,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:52,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:52,879 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-22 02:19:52,881 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-22 02:19:52,881 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:19:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:52,920 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:52,953 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:52,993 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:19:52,993 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:19:52,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:19:53,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:19:53 BoogieIcfgContainer [2021-02-22 02:19:53,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:19:53,013 INFO L168 Benchmark]: Toolchain (without parser) took 4166.79 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 127.2 MB in the beginning and 72.6 MB in the end (delta: 54.7 MB). Peak memory consumption was 91.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:53,013 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:19:53,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:53,015 INFO L168 Benchmark]: Boogie Preprocessor took 89.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:53,016 INFO L168 Benchmark]: RCFGBuilder took 706.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 128.2 MB in the end (delta: -13.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:53,017 INFO L168 Benchmark]: TraceAbstraction took 2985.64 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 127.7 MB in the beginning and 72.6 MB in the end (delta: 55.1 MB). Peak memory consumption was 91.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:53,020 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 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 361.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 706.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 128.2 MB in the end (delta: -13.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2985.64 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 127.7 MB in the beginning and 72.6 MB in the end (delta: 55.1 MB). Peak memory consumption was 91.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 [L31] COND TRUE i