/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/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:48:01,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:48:01,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:48:01,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:48:01,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:48:01,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:48:01,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:48:01,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:48:01,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:48:01,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:48:01,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:48:01,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:48:01,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:48:01,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:48:01,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:48:01,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:48:01,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:48:01,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:48:01,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:48:01,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:48:01,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:48:01,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:48:01,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:48:01,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:48:01,705 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:48:01,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:48:01,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:48:01,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:48:01,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:48:01,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:48:01,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:48:01,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:48:01,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:48:01,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:48:01,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:48:01,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:48:01,708 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:48:01,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:48:01,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:48:01,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:01,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:48:01,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:48:01,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:48:01,710 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:48:01,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:48:02,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:48:02,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:48:02,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:48:02,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:48:02,127 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:48:02,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2021-02-24 04:48:02,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a0017f2/62c492a9009647668ebc8af6b5850f6e/FLAG91748576d [2021-02-24 04:48:02,943 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:48:02,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2021-02-24 04:48:02,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a0017f2/62c492a9009647668ebc8af6b5850f6e/FLAG91748576d [2021-02-24 04:48:03,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a0017f2/62c492a9009647668ebc8af6b5850f6e [2021-02-24 04:48:03,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:48:03,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:48:03,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:03,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:48:03,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:48:03,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f81ca6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03, skipping insertion in model container [2021-02-24 04:48:03,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:48:03,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:48:03,537 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i[893,906] [2021-02-24 04:48:03,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:03,560 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:48:03,575 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i[893,906] [2021-02-24 04:48:03,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:03,599 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:48:03,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03 WrapperNode [2021-02-24 04:48:03,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:03,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:48:03,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:48:03,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:48:03,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:48:03,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:48:03,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:48:03,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:48:03,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (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 [2021-02-24 04:48:03,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:48:03,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:48:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:48:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:48:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:48:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:48:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:48:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:48:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:48:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:48:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:48:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:48:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:48:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:48:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:48:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:48:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:48:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:48:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:48:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:48:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:48:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:48:04,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:48:04,182 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:48:04,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:04 BoogieIcfgContainer [2021-02-24 04:48:04,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:48:04,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:48:04,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:48:04,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:48:04,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:48:03" (1/3) ... [2021-02-24 04:48:04,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190f2f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:04, skipping insertion in model container [2021-02-24 04:48:04,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (2/3) ... [2021-02-24 04:48:04,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190f2f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:04, skipping insertion in model container [2021-02-24 04:48:04,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:04" (3/3) ... [2021-02-24 04:48:04,196 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2021-02-24 04:48:04,204 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:48:04,209 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:48:04,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:48:04,256 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:48:04,257 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:48:04,257 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:48:04,257 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:48:04,257 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:48:04,257 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:48:04,258 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:48:04,258 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:48:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-02-24 04:48:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 04:48:04,285 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:04,286 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] [2021-02-24 04:48:04,287 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:04,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:04,295 INFO L82 PathProgramCache]: Analyzing trace with hash -285804897, now seen corresponding path program 1 times [2021-02-24 04:48:04,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:04,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292282764] [2021-02-24 04:48:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:04,380 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:04,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:04,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:04,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:04,595 WARN L141 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-02-24 04:48:04,596 WARN L147 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size 3 [2021-02-24 04:48:04,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:04,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:04,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:04,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:04,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:48:04,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292282764] [2021-02-24 04:48:04,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:04,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:48:04,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086420978] [2021-02-24 04:48:04,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:48:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:04,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:48:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:48:04,775 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 8 states. [2021-02-24 04:48:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:05,687 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-02-24 04:48:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:48:05,689 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-02-24 04:48:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:05,701 INFO L225 Difference]: With dead ends: 76 [2021-02-24 04:48:05,701 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 04:48:05,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-24 04:48:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 04:48:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-02-24 04:48:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-24 04:48:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-02-24 04:48:05,806 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 31 [2021-02-24 04:48:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:05,808 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-02-24 04:48:05,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:48:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-02-24 04:48:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 04:48:05,810 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:05,811 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 04:48:05,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:48:05,812 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:05,814 INFO L82 PathProgramCache]: Analyzing trace with hash 511937126, now seen corresponding path program 1 times [2021-02-24 04:48:05,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:05,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014829553] [2021-02-24 04:48:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:05,833 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:05,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:05,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:05,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:05,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:05,949 WARN L141 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size [2021-02-24 04:48:05,951 WARN L147 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size 13 [2021-02-24 04:48:05,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:05,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:06,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:06,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:06,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:06,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-24 04:48:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:06,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:48:06,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014829553] [2021-02-24 04:48:06,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:06,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:48:06,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758291402] [2021-02-24 04:48:06,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:48:06,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:48:06,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:48:06,127 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 9 states. [2021-02-24 04:48:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:06,759 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-02-24 04:48:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:48:06,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-24 04:48:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:06,763 INFO L225 Difference]: With dead ends: 53 [2021-02-24 04:48:06,763 INFO L226 Difference]: Without dead ends: 51 [2021-02-24 04:48:06,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-02-24 04:48:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-24 04:48:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-02-24 04:48:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-24 04:48:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-02-24 04:48:06,784 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2021-02-24 04:48:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:06,785 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-02-24 04:48:06,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:48:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-02-24 04:48:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 04:48:06,787 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:06,787 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-02-24 04:48:06,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:48:06,788 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:06,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1259828606, now seen corresponding path program 1 times [2021-02-24 04:48:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:06,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444255173] [2021-02-24 04:48:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:06,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:48:06,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:48:06,888 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-24 04:48:06,909 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:48:06,927 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:06,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-24 04:48:06,952 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-24 04:48:06,964 WARN L141 QuantifierPusher]: treesize reduction 11, result has 78.8 percent of original size [2021-02-24 04:48:06,970 WARN L147 QuantifierPusher]: treesize reduction 11, result has 78.8 percent of original size 41 [2021-02-24 04:48:06,971 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:48:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:07,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:07,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:07,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:07,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:07,134 WARN L141 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-02-24 04:48:07,135 WARN L147 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size 3 [2021-02-24 04:48:07,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:07,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:07,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:07,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:48:07,264 WARN L141 QuantifierPusher]: treesize reduction 7, result has 80.6 percent of original size [2021-02-24 04:48:07,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:48:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:07,274 WARN L147 QuantifierPusher]: treesize reduction 7, result has 80.6 percent of original size 29 [2021-02-24 04:48:07,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:07,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 04:48:07,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 04:48:07,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:48:07,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 04:48:07,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:48:07,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:48:07,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 04:48:07,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 04:48:07,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 04:48:07,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 04:48:07,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 04:48:07,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 04:48:07,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:48:07,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 04:48:07,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:48:07,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:07,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 04:48:07,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-24 04:48:07,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:07,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 04:48:07,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:48:07,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:07,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:07,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444255173] [2021-02-24 04:48:07,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:07,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-24 04:48:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557629047] [2021-02-24 04:48:07,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-24 04:48:07,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-24 04:48:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-24 04:48:07,924 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 18 states. [2021-02-24 04:48:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:09,230 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-02-24 04:48:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-24 04:48:09,231 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2021-02-24 04:48:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:09,237 INFO L225 Difference]: With dead ends: 55 [2021-02-24 04:48:09,237 INFO L226 Difference]: Without dead ends: 53 [2021-02-24 04:48:09,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-02-24 04:48:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-24 04:48:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-24 04:48:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-24 04:48:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-02-24 04:48:09,283 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 45 [2021-02-24 04:48:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:09,283 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-02-24 04:48:09,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-24 04:48:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-02-24 04:48:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-24 04:48:09,288 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:09,288 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-02-24 04:48:09,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:48:09,288 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -712343833, now seen corresponding path program 2 times [2021-02-24 04:48:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:09,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575234462] [2021-02-24 04:48:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:09,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:09,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:48:09,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:09,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:48:09,328 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-24 04:48:09,330 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:48:09,333 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:09,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:09,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:09,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-24 04:48:09,342 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-24 04:48:09,347 WARN L141 QuantifierPusher]: treesize reduction 11, result has 78.8 percent of original size [2021-02-24 04:48:09,350 WARN L147 QuantifierPusher]: treesize reduction 11, result has 78.8 percent of original size 41 [2021-02-24 04:48:09,351 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:48:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:09,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:09,392 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:09,437 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:48:09,437 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:48:09,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:48:09,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:48:09 BoogieIcfgContainer [2021-02-24 04:48:09,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:48:09,462 INFO L168 Benchmark]: Toolchain (without parser) took 6131.08 ms. Allocated memory was 178.3 MB in the beginning and 213.9 MB in the end (delta: 35.7 MB). Free memory was 154.2 MB in the beginning and 118.1 MB in the end (delta: 36.0 MB). Peak memory consumption was 72.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:09,462 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 178.3 MB. Free memory is still 153.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:48:09,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.68 ms. Allocated memory is still 178.3 MB. Free memory was 153.0 MB in the beginning and 143.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:09,469 INFO L168 Benchmark]: Boogie Preprocessor took 40.95 ms. Allocated memory is still 178.3 MB. Free memory was 143.3 MB in the beginning and 141.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:09,470 INFO L168 Benchmark]: RCFGBuilder took 541.24 ms. Allocated memory is still 178.3 MB. Free memory was 141.9 MB in the beginning and 158.8 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:09,471 INFO L168 Benchmark]: TraceAbstraction took 5273.74 ms. Allocated memory was 178.3 MB in the beginning and 213.9 MB in the end (delta: 35.7 MB). Free memory was 158.3 MB in the beginning and 118.1 MB in the end (delta: 40.1 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:09,473 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 178.3 MB. Free memory is still 153.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.68 ms. Allocated memory is still 178.3 MB. Free memory was 153.0 MB in the beginning and 143.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.95 ms. Allocated memory is still 178.3 MB. Free memory was 143.3 MB in the beginning and 141.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 541.24 ms. Allocated memory is still 178.3 MB. Free memory was 141.9 MB in the beginning and 158.8 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5273.74 ms. Allocated memory was 178.3 MB in the beginning and 213.9 MB in the end (delta: 35.7 MB). Free memory was 158.3 MB in the beginning and 118.1 MB in the end (delta: 40.1 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int MAXPATHLEN; [L27] int pathbuf_off; [L28] int bound_off; [L29] int glob2_p_off; [L30] int glob2_pathbuf_off; [L31] int glob2_pathlim_off; [L32] MAXPATHLEN = __VERIFIER_nondet_int() [L33] COND TRUE MAXPATHLEN > 0 && MAXPATHLEN < 2147483647 [L34] pathbuf_off = 0 [L35] bound_off = pathbuf_off + (MAXPATHLEN + 1) - 1 [L36] glob2_pathbuf_off = pathbuf_off [L37] glob2_pathlim_off = bound_off [L38] glob2_p_off = glob2_pathbuf_off [L39] COND TRUE glob2_p_off <= glob2_pathlim_off [L41] CALL __VERIFIER_assert (0 <= glob2_p_off ) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert (0 <= glob2_p_off ) [L42] CALL __VERIFIER_assert (glob2_p_off < MAXPATHLEN + 1) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert (glob2_p_off < MAXPATHLEN + 1) [L40] glob2_p_off++ [L39] COND TRUE glob2_p_off <= glob2_pathlim_off [L41] CALL __VERIFIER_assert (0 <= glob2_p_off ) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert (0 <= glob2_p_off ) [L42] CALL __VERIFIER_assert (glob2_p_off < MAXPATHLEN + 1) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 101 SDtfs, 197 SDslu, 276 SDs, 0 SdLazy, 551 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...