/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:53:48,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:53:48,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:53:48,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:53:48,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:53:48,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:53:48,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:53:48,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:53:48,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:53:48,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:53:48,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:53:48,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:53:48,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:53:48,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:53:48,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:53:48,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:53:48,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:53:48,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:53:48,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:53:48,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:53:48,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:53:48,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:53:48,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:53:48,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:53:48,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:53:48,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:53:48,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:53:48,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:53:48,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:53:48,962 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:53:48,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:53:48,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:53:48,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:53:48,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:53:48,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:53:48,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:53:48,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:53:48,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:53:48,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:53:48,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:53:48,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:53:48,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:53:48,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:53:48,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:53:48,977 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:53:48,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:53:48,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:53:48,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:53:48,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:53:48,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:53:48,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:53:48,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:53:49,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:53:49,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:53:49,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:53:49,567 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:53:49,568 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:53:49,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-23 18:53:49,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/842bec242/b0701ed5cb0f4f3ca3f07d2cf192ab97/FLAGf85627adc [2021-02-23 18:53:50,512 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:53:50,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-23 18:53:50,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/842bec242/b0701ed5cb0f4f3ca3f07d2cf192ab97/FLAGf85627adc [2021-02-23 18:53:50,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/842bec242/b0701ed5cb0f4f3ca3f07d2cf192ab97 [2021-02-23 18:53:50,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:53:50,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:53:50,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:53:50,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:53:50,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:53:50,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:53:50" (1/1) ... [2021-02-23 18:53:50,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a10bdcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:50, skipping insertion in model container [2021-02-23 18:53:50,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:53:50" (1/1) ... [2021-02-23 18:53:50,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:53:50,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:53:51,156 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/apache-get-tag.i[893,906] [2021-02-23 18:53:51,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:53:51,194 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:53:51,217 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/apache-get-tag.i[893,906] [2021-02-23 18:53:51,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:53:51,247 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:53:51,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51 WrapperNode [2021-02-23 18:53:51,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:53:51,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:53:51,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:53:51,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:53:51,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (1/1) ... [2021-02-23 18:53:51,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (1/1) ... [2021-02-23 18:53:51,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (1/1) ... [2021-02-23 18:53:51,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (1/1) ... [2021-02-23 18:53:51,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (1/1) ... [2021-02-23 18:53:51,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (1/1) ... [2021-02-23 18:53:51,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (1/1) ... [2021-02-23 18:53:51,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:53:51,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:53:51,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:53:51,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:53:51,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (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 [2021-02-23 18:53:51,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:53:51,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:53:51,436 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:53:51,436 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 18:53:51,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:53:51,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:53:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:53:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:53:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:53:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:53:51,438 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:53:51,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:53:51,438 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 18:53:51,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:53:51,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:53:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:53:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:53:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:53:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:53:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:53:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:53:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:53:51,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:53:51,980 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 18:53:51,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:53:51 BoogieIcfgContainer [2021-02-23 18:53:51,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:53:51,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:53:51,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:53:51,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:53:51,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:53:50" (1/3) ... [2021-02-23 18:53:51,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b33a0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:53:51, skipping insertion in model container [2021-02-23 18:53:51,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:53:51" (2/3) ... [2021-02-23 18:53:51,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b33a0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:53:51, skipping insertion in model container [2021-02-23 18:53:51,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:53:51" (3/3) ... [2021-02-23 18:53:51,996 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2021-02-23 18:53:52,007 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:53:52,013 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:53:52,040 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:53:52,074 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:53:52,076 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:53:52,076 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:53:52,077 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:53:52,077 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:53:52,077 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:53:52,077 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:53:52,077 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:53:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2021-02-23 18:53:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 18:53:52,131 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:53:52,132 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] [2021-02-23 18:53:52,133 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:53:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:53:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1183090698, now seen corresponding path program 1 times [2021-02-23 18:53:52,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:53:52,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908569873] [2021-02-23 18:53:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:53:52,314 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:53:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:52,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:52,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:52,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:52,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:52,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:53:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:52,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:52,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:53:52,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908569873] [2021-02-23 18:53:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:53:52,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:53:52,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947409480] [2021-02-23 18:53:52,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:53:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:53:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:53:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:53:52,647 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2021-02-23 18:53:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:53:53,053 INFO L93 Difference]: Finished difference Result 142 states and 211 transitions. [2021-02-23 18:53:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:53:53,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-02-23 18:53:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:53:53,070 INFO L225 Difference]: With dead ends: 142 [2021-02-23 18:53:53,071 INFO L226 Difference]: Without dead ends: 76 [2021-02-23 18:53:53,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:53:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-23 18:53:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-02-23 18:53:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-23 18:53:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-02-23 18:53:53,168 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 26 [2021-02-23 18:53:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:53:53,169 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-02-23 18:53:53,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:53:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-02-23 18:53:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 18:53:53,171 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:53:53,171 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] [2021-02-23 18:53:53,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:53:53,172 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:53:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:53:53,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2035797628, now seen corresponding path program 1 times [2021-02-23 18:53:53,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:53:53,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43356447] [2021-02-23 18:53:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:53:53,180 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:53:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:53,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:53,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:53,363 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-23 18:53:53,366 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-23 18:53:53,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:53,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:53,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:53,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:53,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:53,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:53,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:53:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:53,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:53,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:53:53,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43356447] [2021-02-23 18:53:53,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:53:53,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:53:53,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401868362] [2021-02-23 18:53:53,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:53:53,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:53:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:53:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:53:53,507 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 6 states. [2021-02-23 18:53:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:53:54,130 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2021-02-23 18:53:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:53:54,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-23 18:53:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:53:54,135 INFO L225 Difference]: With dead ends: 98 [2021-02-23 18:53:54,135 INFO L226 Difference]: Without dead ends: 96 [2021-02-23 18:53:54,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:53:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-23 18:53:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-02-23 18:53:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-02-23 18:53:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2021-02-23 18:53:54,172 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 27 [2021-02-23 18:53:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:53:54,173 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2021-02-23 18:53:54,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:53:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2021-02-23 18:53:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 18:53:54,175 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:53:54,176 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] [2021-02-23 18:53:54,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:53:54,176 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:53:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:53:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash 836322033, now seen corresponding path program 1 times [2021-02-23 18:53:54,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:53:54,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512783870] [2021-02-23 18:53:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:53:54,182 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:53:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:54,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:54,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:54,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:54,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:53:54,308 WARN L141 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size [2021-02-23 18:53:54,311 WARN L147 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size 20 [2021-02-23 18:53:54,361 WARN L141 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size [2021-02-23 18:53:54,364 WARN L147 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size 11 [2021-02-23 18:53:54,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:54,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:54,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:54,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:54,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:54,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:54,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:53:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:54,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:54,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:54,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-23 18:53:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:54,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:54,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:53:54,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512783870] [2021-02-23 18:53:54,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:53:54,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:53:54,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708815265] [2021-02-23 18:53:54,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:53:54,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:53:54,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:53:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:53:54,487 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 8 states. [2021-02-23 18:53:55,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:53:55,164 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2021-02-23 18:53:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:53:55,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-23 18:53:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:53:55,167 INFO L225 Difference]: With dead ends: 102 [2021-02-23 18:53:55,167 INFO L226 Difference]: Without dead ends: 91 [2021-02-23 18:53:55,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-23 18:53:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-23 18:53:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-02-23 18:53:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-23 18:53:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-02-23 18:53:55,191 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 32 [2021-02-23 18:53:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:53:55,191 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-02-23 18:53:55,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:53:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-02-23 18:53:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 18:53:55,193 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:53:55,193 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] [2021-02-23 18:53:55,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:53:55,194 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:53:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:53:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1034410599, now seen corresponding path program 1 times [2021-02-23 18:53:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:53:55,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788838190] [2021-02-23 18:53:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:53:55,199 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:53:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:55,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:55,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:53:55,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:53:55,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:53:55,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:55,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:55,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:55,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:53:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:55,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:55,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 18:53:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:55,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:55,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:53:55,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788838190] [2021-02-23 18:53:55,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:53:55,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:53:55,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912794878] [2021-02-23 18:53:55,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:53:55,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:53:55,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:53:55,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:53:55,364 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 8 states. [2021-02-23 18:53:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:53:55,974 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-02-23 18:53:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:53:55,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-23 18:53:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:53:55,977 INFO L225 Difference]: With dead ends: 97 [2021-02-23 18:53:55,978 INFO L226 Difference]: Without dead ends: 95 [2021-02-23 18:53:55,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-23 18:53:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-23 18:53:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-02-23 18:53:56,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-23 18:53:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-02-23 18:53:56,002 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 35 [2021-02-23 18:53:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:53:56,003 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-02-23 18:53:56,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:53:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-02-23 18:53:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 18:53:56,005 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:53:56,005 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:53:56,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:53:56,006 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:53:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:53:56,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1264498093, now seen corresponding path program 1 times [2021-02-23 18:53:56,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:53:56,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434436267] [2021-02-23 18:53:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:53:56,010 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:53:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:56,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:56,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:53:56,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:53:56,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:53:56,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:56,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:53:56,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:56,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:53:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:56,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:56,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 18:53:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:56,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:56,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 18:53:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:53:56,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:56,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:53:56,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434436267] [2021-02-23 18:53:56,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:53:56,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:53:56,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375225245] [2021-02-23 18:53:56,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:53:56,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:53:56,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:53:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:53:56,176 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 8 states. [2021-02-23 18:53:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:53:56,950 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2021-02-23 18:53:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 18:53:56,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2021-02-23 18:53:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:53:56,953 INFO L225 Difference]: With dead ends: 127 [2021-02-23 18:53:56,953 INFO L226 Difference]: Without dead ends: 124 [2021-02-23 18:53:56,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:53:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-23 18:53:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-02-23 18:53:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-02-23 18:53:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-02-23 18:53:57,014 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 45 [2021-02-23 18:53:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:53:57,015 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-02-23 18:53:57,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:53:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-02-23 18:53:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 18:53:57,024 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:53:57,025 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-02-23 18:53:57,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:53:57,025 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:53:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:53:57,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1741298737, now seen corresponding path program 1 times [2021-02-23 18:53:57,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:53:57,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291182765] [2021-02-23 18:53:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:53:57,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:53:57,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:53:59,330 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-23 18:53:59,342 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size [2021-02-23 18:53:59,387 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size 102 [2021-02-23 18:53:59,388 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:53:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:53:59,410 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:53:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:53:59,428 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:53:59,477 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:53:59,478 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:53:59,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:53:59,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:53:59 BoogieIcfgContainer [2021-02-23 18:53:59,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:53:59,534 INFO L168 Benchmark]: Toolchain (without parser) took 8698.16 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 130.7 MB in the beginning and 133.5 MB in the end (delta: -2.7 MB). Peak memory consumption was 29.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:53:59,535 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:53:59,536 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.06 ms. Allocated memory is still 154.1 MB. Free memory was 129.7 MB in the beginning and 119.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:53:59,537 INFO L168 Benchmark]: Boogie Preprocessor took 59.50 ms. Allocated memory is still 154.1 MB. Free memory was 119.7 MB in the beginning and 118.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:53:59,541 INFO L168 Benchmark]: RCFGBuilder took 673.31 ms. Allocated memory is still 154.1 MB. Free memory was 118.0 MB in the beginning and 128.9 MB in the end (delta: -10.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:53:59,545 INFO L168 Benchmark]: TraceAbstraction took 7546.43 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 128.4 MB in the beginning and 133.5 MB in the end (delta: -5.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:53:59,552 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 394.06 ms. Allocated memory is still 154.1 MB. Free memory was 129.7 MB in the beginning and 119.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.50 ms. Allocated memory is still 154.1 MB. Free memory was 119.7 MB in the beginning and 118.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 673.31 ms. Allocated memory is still 154.1 MB. Free memory was 118.0 MB in the beginning and 128.9 MB in the end (delta: -10.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7546.43 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 128.4 MB in the beginning and 133.5 MB in the end (delta: -5.0 MB). Peak memory consumption was 28.0 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 tagbuf_len; [L27] int t; [L28] tagbuf_len = __VERIFIER_nondet_int() [L29] COND TRUE tagbuf_len >= 1 [L30] t = 0 [L31] --tagbuf_len [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND FALSE !(__VERIFIER_nondet_int()) [L41] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(0 <= t) [L42] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(t <= tagbuf_len) [L43] t++ [L32] COND TRUE 1 [L33] COND TRUE t == tagbuf_len [L34] CALL __VERIFIER_assert(0 <= t) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 376 SDtfs, 483 SDslu, 363 SDs, 0 SdLazy, 1297 SolverSat, 212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 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...