/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-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:29:46,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:29:46,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:29:46,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:29:46,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:29:46,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:29:46,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:29:46,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:29:46,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:29:46,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:29:46,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:29:46,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:29:46,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:29:46,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:29:46,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:29:46,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:29:46,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:29:46,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:29:46,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:29:46,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:29:46,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:29:46,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:29:46,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:29:46,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:29:46,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:29:46,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:29:46,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:29:46,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:29:46,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:29:46,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:29:46,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:29:46,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:29:46,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:29:46,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:29:46,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:29:46,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:29:46,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:29:46,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:29:46,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:29:46,379 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:29:46,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:29:46,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:29:46,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:29:46,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:29:46,381 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:29:46,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:29:46,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:29:46,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:29:46,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:29:46,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:29:46,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:29:46,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:29:46,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:29:46,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:29:46,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:29:46,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:29:46,817 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:29:46,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2021-02-21 21:29:46,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5398ed8/f0cb3792e33a4838a12971aa619dba7a/FLAGa5a10e282 [2021-02-21 21:29:47,579 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:29:47,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2021-02-21 21:29:47,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5398ed8/f0cb3792e33a4838a12971aa619dba7a/FLAGa5a10e282 [2021-02-21 21:29:47,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5398ed8/f0cb3792e33a4838a12971aa619dba7a [2021-02-21 21:29:47,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:29:47,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:29:47,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:29:47,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:29:47,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:29:47,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:29:47" (1/1) ... [2021-02-21 21:29:47,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3836afcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:47, skipping insertion in model container [2021-02-21 21:29:47,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:29:47" (1/1) ... [2021-02-21 21:29:47,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:29:47,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:29:48,118 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-new/half.i[891,904] [2021-02-21 21:29:48,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:29:48,143 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:29:48,156 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-new/half.i[891,904] [2021-02-21 21:29:48,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:29:48,177 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:29:48,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48 WrapperNode [2021-02-21 21:29:48,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:29:48,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:29:48,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:29:48,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:29:48,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (1/1) ... [2021-02-21 21:29:48,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (1/1) ... [2021-02-21 21:29:48,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (1/1) ... [2021-02-21 21:29:48,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (1/1) ... [2021-02-21 21:29:48,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (1/1) ... [2021-02-21 21:29:48,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (1/1) ... [2021-02-21 21:29:48,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (1/1) ... [2021-02-21 21:29:48,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:29:48,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:29:48,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:29:48,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:29:48,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (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 [2021-02-21 21:29:48,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:29:48,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:29:48,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:29:48,330 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:29:48,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:29:48,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:29:48,331 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:29:48,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:29:48,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:29:48,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:29:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:29:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:29:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:29:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:29:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:29:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:29:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:29:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:29:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:29:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:29:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:29:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:29:48,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:29:48,729 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:29:48,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:29:48 BoogieIcfgContainer [2021-02-21 21:29:48,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:29:48,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:29:48,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:29:48,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:29:48,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:29:47" (1/3) ... [2021-02-21 21:29:48,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54aa2fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:29:48, skipping insertion in model container [2021-02-21 21:29:48,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:29:48" (2/3) ... [2021-02-21 21:29:48,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54aa2fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:29:48, skipping insertion in model container [2021-02-21 21:29:48,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:29:48" (3/3) ... [2021-02-21 21:29:48,741 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2021-02-21 21:29:48,749 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:29:48,755 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:29:48,777 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:29:48,833 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:29:48,833 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:29:48,834 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:29:48,834 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:29:48,834 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:29:48,834 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:29:48,834 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:29:48,835 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:29:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-21 21:29:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 21:29:48,898 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:29:48,899 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] [2021-02-21 21:29:48,899 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:29:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:29:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash 535719879, now seen corresponding path program 1 times [2021-02-21 21:29:48,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:29:48,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234186152] [2021-02-21 21:29:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:29:48,999 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:29:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:49,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:49,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:29:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:49,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:29:49,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234186152] [2021-02-21 21:29:49,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:29:49,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:29:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033629933] [2021-02-21 21:29:49,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:29:49,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:29:49,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:29:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:29:49,207 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2021-02-21 21:29:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:29:49,303 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-02-21 21:29:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:29:49,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-02-21 21:29:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:29:49,315 INFO L225 Difference]: With dead ends: 52 [2021-02-21 21:29:49,315 INFO L226 Difference]: Without dead ends: 31 [2021-02-21 21:29:49,319 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 [2021-02-21 21:29:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-21 21:29:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-21 21:29:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-21 21:29:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-02-21 21:29:49,404 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2021-02-21 21:29:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:29:49,405 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-02-21 21:29:49,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:29:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-02-21 21:29:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 21:29:49,407 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:29:49,408 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] [2021-02-21 21:29:49,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:29:49,409 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:29:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:29:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash 520943543, now seen corresponding path program 1 times [2021-02-21 21:29:49,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:29:49,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408681298] [2021-02-21 21:29:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:29:49,433 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:29:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:49,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:49,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:29:49,576 WARN L141 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size [2021-02-21 21:29:49,578 WARN L147 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size 8 [2021-02-21 21:29:49,588 WARN L141 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-02-21 21:29:49,589 WARN L147 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size 12 [2021-02-21 21:29:49,604 WARN L141 QuantifierPusher]: treesize reduction 8, result has 60.0 percent of original size [2021-02-21 21:29:49,606 WARN L147 QuantifierPusher]: treesize reduction 8, result has 60.0 percent of original size 12 [2021-02-21 21:29:49,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:29:49,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:29:49,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:49,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:29:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:49,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:49,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:29:49,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408681298] [2021-02-21 21:29:49,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:29:49,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:29:49,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122290676] [2021-02-21 21:29:49,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:29:49,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:29:49,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:29:49,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:29:49,717 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2021-02-21 21:29:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:29:50,109 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-02-21 21:29:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:29:50,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2021-02-21 21:29:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:29:50,113 INFO L225 Difference]: With dead ends: 51 [2021-02-21 21:29:50,113 INFO L226 Difference]: Without dead ends: 35 [2021-02-21 21:29:50,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:29:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-21 21:29:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-02-21 21:29:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-21 21:29:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-21 21:29:50,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2021-02-21 21:29:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:29:50,151 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-21 21:29:50,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:29:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-21 21:29:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:29:50,155 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:29:50,155 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] [2021-02-21 21:29:50,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:29:50,156 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:29:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:29:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash 430650734, now seen corresponding path program 1 times [2021-02-21 21:29:50,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:29:50,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813516971] [2021-02-21 21:29:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:29:50,223 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:29:50,226 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:29:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:50,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:50,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:50,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:50,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:29:50,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:50,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:29:50,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:50,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:29:50,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:50,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:29:50,349 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-21 21:29:50,350 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-21 21:29:50,376 WARN L141 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size [2021-02-21 21:29:50,377 WARN L147 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size 12 [2021-02-21 21:29:50,395 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 21:29:50,396 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 21:29:50,410 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-21 21:29:50,411 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-21 21:29:50,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:50,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:50,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:29:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:50,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:50,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:29:50,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813516971] [2021-02-21 21:29:50,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:29:50,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:29:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358263425] [2021-02-21 21:29:50,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:29:50,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:29:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:29:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:29:50,455 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 10 states. [2021-02-21 21:29:50,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:29:50,930 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-02-21 21:29:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 21:29:50,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-21 21:29:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:29:50,934 INFO L225 Difference]: With dead ends: 50 [2021-02-21 21:29:50,934 INFO L226 Difference]: Without dead ends: 45 [2021-02-21 21:29:50,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:29:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-21 21:29:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-02-21 21:29:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-21 21:29:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-02-21 21:29:50,964 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2021-02-21 21:29:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:29:50,966 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-02-21 21:29:50,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:29:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-02-21 21:29:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:29:50,969 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:29:50,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:29:50,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:29:50,970 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:29:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:29:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash -828200805, now seen corresponding path program 1 times [2021-02-21 21:29:50,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:29:50,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304251538] [2021-02-21 21:29:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:29:54,259 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 27 [2021-02-21 21:29:54,266 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-21 21:29:54,291 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-21 21:29:54,292 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:29:54,293 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:29:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:54,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:54,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:29:54,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:29:54,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:29:54,392 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size [2021-02-21 21:29:54,393 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size 20 [2021-02-21 21:29:54,412 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size [2021-02-21 21:29:54,414 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size 20 [2021-02-21 21:29:54,435 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-21 21:29:54,436 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-21 21:29:54,458 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-21 21:29:54,460 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-21 21:29:54,480 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-21 21:29:54,481 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-21 21:29:54,506 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-21 21:29:54,511 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-21 21:29:54,538 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-21 21:29:54,539 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-21 21:29:54,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:29:54,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:29:54,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:54,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:29:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:54,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:54,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:29:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304251538] [2021-02-21 21:29:54,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:29:54,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 21:29:54,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056467179] [2021-02-21 21:29:54,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 21:29:54,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:29:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 21:29:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:29:54,651 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2021-02-21 21:29:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:29:55,584 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-02-21 21:29:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 21:29:55,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2021-02-21 21:29:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:29:55,589 INFO L225 Difference]: With dead ends: 55 [2021-02-21 21:29:55,590 INFO L226 Difference]: Without dead ends: 50 [2021-02-21 21:29:55,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-02-21 21:29:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-21 21:29:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-02-21 21:29:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-21 21:29:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-02-21 21:29:55,611 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2021-02-21 21:29:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:29:55,612 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-02-21 21:29:55,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 21:29:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-02-21 21:29:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:29:55,616 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:29:55,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:29:55,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:29:55,617 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:29:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:29:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash -509096923, now seen corresponding path program 2 times [2021-02-21 21:29:55,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:29:55,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235966853] [2021-02-21 21:29:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:29:58,438 WARN L202 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-21 21:29:58,442 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-21 21:29:58,449 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-21 21:29:58,449 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:29:58,451 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:29:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:58,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:58,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:58,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:58,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:29:58,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:58,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:29:58,525 WARN L141 QuantifierPusher]: treesize reduction 29, result has 59.7 percent of original size [2021-02-21 21:29:58,527 WARN L147 QuantifierPusher]: treesize reduction 29, result has 59.7 percent of original size 43 [2021-02-21 21:29:58,548 WARN L141 QuantifierPusher]: treesize reduction 69, result has 48.1 percent of original size [2021-02-21 21:29:58,551 WARN L147 QuantifierPusher]: treesize reduction 69, result has 48.1 percent of original size 64 [2021-02-21 21:29:58,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:58,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:58,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:29:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:58,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:58,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:29:58,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235966853] [2021-02-21 21:29:58,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:29:58,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:29:58,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404989636] [2021-02-21 21:29:58,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:29:58,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:29:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:29:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:29:58,591 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 6 states. [2021-02-21 21:29:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:29:58,809 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-02-21 21:29:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:29:58,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2021-02-21 21:29:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:29:58,810 INFO L225 Difference]: With dead ends: 61 [2021-02-21 21:29:58,810 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 21:29:58,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:29:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 21:29:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-02-21 21:29:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-21 21:29:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-02-21 21:29:58,825 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2021-02-21 21:29:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:29:58,825 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-02-21 21:29:58,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:29:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-02-21 21:29:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:29:58,826 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:29:58,827 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-21 21:29:58,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:29:58,827 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:29:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:29:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2105786962, now seen corresponding path program 2 times [2021-02-21 21:29:58,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:29:58,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780371303] [2021-02-21 21:29:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:29:58,941 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:29:58,943 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:29:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:59,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:59,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:29:59,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:29:59,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:29:59,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:29:59,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:29:59,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:29:59,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:29:59,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:29:59,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:29:59,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:29:59,135 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 21:29:59,136 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 21:29:59,155 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 21:29:59,156 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 21:29:59,183 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 21:29:59,185 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 21:29:59,216 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-21 21:29:59,217 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-21 21:29:59,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:59,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:29:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:29:59,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:29:59,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:29:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:29:59,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780371303] [2021-02-21 21:29:59,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:29:59,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:29:59,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795385244] [2021-02-21 21:29:59,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:29:59,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:29:59,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:29:59,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:29:59,275 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2021-02-21 21:30:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:30:00,616 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-02-21 21:30:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 21:30:00,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-02-21 21:30:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:30:00,618 INFO L225 Difference]: With dead ends: 76 [2021-02-21 21:30:00,618 INFO L226 Difference]: Without dead ends: 58 [2021-02-21 21:30:00,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-02-21 21:30:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-21 21:30:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-02-21 21:30:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 21:30:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-21 21:30:00,635 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-02-21 21:30:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:30:00,636 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-21 21:30:00,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:30:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-21 21:30:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 21:30:00,637 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:30:00,637 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:30:00,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:30:00,638 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:30:00,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:30:00,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2102561335, now seen corresponding path program 3 times [2021-02-21 21:30:00,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:30:00,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155334135] [2021-02-21 21:30:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:30:00,653 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-21 21:30:00,655 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-21 21:30:00,692 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-21 21:30:00,695 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-21 21:30:00,727 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-21 21:30:00,729 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-21 21:30:00,767 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-21 21:30:00,771 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-21 21:30:00,829 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:30:00,831 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:30:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:00,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:00,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:30:00,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:00,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:00,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:30:00,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:30:00,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:00,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:00,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:00,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:00,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:01,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:01,024 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-21 21:30:01,027 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-21 21:30:01,064 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-21 21:30:01,065 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-21 21:30:01,093 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-21 21:30:01,094 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-21 21:30:01,131 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-21 21:30:01,134 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-21 21:30:01,159 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-21 21:30:01,160 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-21 21:30:01,188 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-21 21:30:01,189 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-21 21:30:01,222 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-21 21:30:01,226 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-21 21:30:01,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:01,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:30:01,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:01,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:30:01,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:01,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:01,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:30:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:01,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:01,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:30:01,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155334135] [2021-02-21 21:30:01,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:30:01,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-21 21:30:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7562017] [2021-02-21 21:30:01,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-21 21:30:01,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:30:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-21 21:30:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-02-21 21:30:01,370 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2021-02-21 21:30:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:30:03,406 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-02-21 21:30:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-21 21:30:03,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2021-02-21 21:30:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:30:03,408 INFO L225 Difference]: With dead ends: 68 [2021-02-21 21:30:03,408 INFO L226 Difference]: Without dead ends: 63 [2021-02-21 21:30:03,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2021-02-21 21:30:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-21 21:30:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-02-21 21:30:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-21 21:30:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-02-21 21:30:03,425 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2021-02-21 21:30:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:30:03,426 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-02-21 21:30:03,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-21 21:30:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-02-21 21:30:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-21 21:30:03,427 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:30:03,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:30:03,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:30:03,428 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:30:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:30:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1730622729, now seen corresponding path program 4 times [2021-02-21 21:30:03,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:30:03,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631245254] [2021-02-21 21:30:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:30:06,320 WARN L202 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-21 21:30:06,324 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-21 21:30:06,329 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-21 21:30:06,329 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:30:06,331 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:30:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:06,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:06,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:30:06,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:30:06,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:06,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:06,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:06,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:06,437 WARN L141 QuantifierPusher]: treesize reduction 57, result has 25.0 percent of original size [2021-02-21 21:30:06,438 WARN L147 QuantifierPusher]: treesize reduction 57, result has 25.0 percent of original size 19 [2021-02-21 21:30:06,468 WARN L141 QuantifierPusher]: treesize reduction 69, result has 30.3 percent of original size [2021-02-21 21:30:06,470 WARN L147 QuantifierPusher]: treesize reduction 69, result has 30.3 percent of original size 30 [2021-02-21 21:30:06,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:06,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:30:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:06,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:06,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:30:06,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631245254] [2021-02-21 21:30:06,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:30:06,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:30:06,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176245526] [2021-02-21 21:30:06,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:30:06,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:30:06,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:30:06,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:30:06,515 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 10 states. [2021-02-21 21:30:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:30:07,040 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-02-21 21:30:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:30:07,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2021-02-21 21:30:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:30:07,042 INFO L225 Difference]: With dead ends: 74 [2021-02-21 21:30:07,042 INFO L226 Difference]: Without dead ends: 61 [2021-02-21 21:30:07,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:30:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-21 21:30:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-02-21 21:30:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-21 21:30:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-02-21 21:30:07,061 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2021-02-21 21:30:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:30:07,062 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-02-21 21:30:07,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:30:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-02-21 21:30:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-21 21:30:07,063 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:30:07,063 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:30:07,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:30:07,063 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:30:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:30:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1938405394, now seen corresponding path program 5 times [2021-02-21 21:30:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:30:07,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691959937] [2021-02-21 21:30:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:30:07,200 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:30:07,201 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:30:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:07,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:07,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:30:07,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:07,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:07,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:30:07,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:30:07,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:07,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:07,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:07,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:07,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:07,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:07,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:07,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:07,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:07,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:07,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:07,486 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 21:30:07,487 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 21:30:07,510 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 21:30:07,510 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 21:30:07,536 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 21:30:07,537 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 21:30:07,561 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-21 21:30:07,562 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-21 21:30:07,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:07,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:30:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:07,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:07,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:30:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691959937] [2021-02-21 21:30:07,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:30:07,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 21:30:07,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392206946] [2021-02-21 21:30:07,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 21:30:07,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:30:07,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 21:30:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:30:07,628 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 19 states. [2021-02-21 21:30:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:30:08,908 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-02-21 21:30:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 21:30:08,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2021-02-21 21:30:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:30:08,910 INFO L225 Difference]: With dead ends: 82 [2021-02-21 21:30:08,910 INFO L226 Difference]: Without dead ends: 64 [2021-02-21 21:30:08,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-02-21 21:30:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-21 21:30:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-21 21:30:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 21:30:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-02-21 21:30:08,939 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2021-02-21 21:30:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:30:08,939 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-02-21 21:30:08,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 21:30:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-02-21 21:30:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-21 21:30:08,940 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:30:08,941 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:30:08,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:30:08,941 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:30:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:30:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash -195090917, now seen corresponding path program 6 times [2021-02-21 21:30:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:30:08,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206978714] [2021-02-21 21:30:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:30:08,955 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-21 21:30:08,957 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-21 21:30:08,987 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-21 21:30:08,991 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-21 21:30:09,021 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-21 21:30:09,028 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-21 21:30:09,061 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-21 21:30:09,065 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-21 21:30:11,868 WARN L202 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-21 21:30:11,873 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-21 21:30:11,876 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-21 21:30:13,925 WARN L141 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-02-21 21:30:13,928 WARN L147 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size 36 [2021-02-21 21:30:13,929 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:30:13,930 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:30:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:14,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:14,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:30:14,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:14,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:30:14,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:30:14,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:30:14,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:14,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:14,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:14,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:14,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:14,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:14,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:14,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:30:14,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:14,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:30:14,203 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-21 21:30:14,204 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-21 21:30:14,231 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-21 21:30:14,232 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-21 21:30:14,262 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-21 21:30:14,263 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-21 21:30:14,298 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-21 21:30:14,299 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-21 21:30:14,330 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-21 21:30:14,331 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-21 21:30:14,358 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-21 21:30:14,359 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-21 21:30:14,388 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-21 21:30:14,389 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-21 21:30:14,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:30:14,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:30:14,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:30:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:30:14,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:30:14,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:30:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:30:14,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206978714] [2021-02-21 21:30:14,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:30:14,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-02-21 21:30:14,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100658477] [2021-02-21 21:30:14,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-21 21:30:14,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:30:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-21 21:30:14,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-02-21 21:30:14,523 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 23 states. [2021-02-21 21:30:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:30:16,045 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-02-21 21:30:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-21 21:30:16,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2021-02-21 21:30:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:30:16,046 INFO L225 Difference]: With dead ends: 63 [2021-02-21 21:30:16,046 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:30:16,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2021-02-21 21:30:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:30:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:30:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:30:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:30:16,049 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-02-21 21:30:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:30:16,049 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:30:16,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-21 21:30:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:30:16,049 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:30:16,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:30:16,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:30:16,610 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2021-02-21 21:30:17,175 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-21 21:30:17,175 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-21 21:30:17,175 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-21 21:30:17,175 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-21 21:30:17,175 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-21 21:30:17,175 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:30:17,176 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:30:17,177 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:30:17,177 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:30:17,177 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:30:17,177 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-21 21:30:17,177 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-21 21:30:17,177 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-21 21:30:17,177 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-21 21:30:17,177 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-21 21:30:17,178 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (and (<= (+ main_~n~0 1) main_~k~0) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0))) [2021-02-21 21:30:17,178 INFO L185 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse0 (* 2 |main_#t~post5|))) (and (<= (+ main_~n~0 1) main_~k~0) (<= main_~i~0 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) (<= .cse0 main_~i~0))) [2021-02-21 21:30:17,178 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-21 21:30:17,178 INFO L185 CegarLoopUtils]: At program point L31-2(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |main_#t~post5|)) (.cse2 (* 2 main_~n~0)) (.cse1 (+ main_~i~0 2))) (and (<= main_~i~0 .cse0) (<= .cse1 .cse2) (<= .cse0 main_~i~0) (<= .cse2 .cse1) (< main_~n~0 (+ main_~k~0 1)))) [2021-02-21 21:30:17,178 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-21 21:30:17,178 INFO L185 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-21 21:30:17,178 INFO L185 CegarLoopUtils]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (let ((.cse3 (+ main_~i~0 1))) (and (<= .cse1 .cse3) (<= .cse3 .cse1) .cse2)))) [2021-02-21 21:30:17,179 INFO L185 CegarLoopUtils]: At program point L27-2(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-21 21:30:17,179 INFO L185 CegarLoopUtils]: At program point L29-4(line 29) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse3 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ |main_#t~post4| 2)) (.cse2 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse2 .cse1) (<= .cse1 .cse2) .cse3)) (let ((.cse5 (+ |main_#t~post4| 1)) (.cse4 (+ main_~i~0 1))) (and (<= .cse1 .cse4) (<= .cse5 .cse1) (<= .cse1 .cse5) (<= .cse4 .cse1) .cse3)))) [2021-02-21 21:30:17,179 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 36) the Hoare annotation is: true [2021-02-21 21:30:17,179 INFO L185 CegarLoopUtils]: At program point L29-5(line 29) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ |main_#t~post4| 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) .cse2)) (let ((.cse3 (+ main_~i~0 1)) (.cse4 (+ |main_#t~post4| 2))) (and (<= .cse1 .cse3) (<= .cse3 .cse1) (<= .cse4 .cse1) (<= .cse1 .cse4) .cse2)))) [2021-02-21 21:30:17,179 INFO L185 CegarLoopUtils]: At program point L29-6(lines 29 33) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (and (= main_~i~0 0) (= main_~n~0 0)) (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) .cse2))) [2021-02-21 21:30:17,180 INFO L185 CegarLoopUtils]: At program point L29-7(lines 29 33) the Hoare annotation is: (or (and (<= main_~k~0 main_~n~0) (< main_~n~0 (+ main_~k~0 1))) (and (= main_~i~0 0) (= main_~n~0 0) (<= main_~k~0 0))) [2021-02-21 21:30:17,180 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 36) the Hoare annotation is: true [2021-02-21 21:30:17,180 INFO L192 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: true [2021-02-21 21:30:17,180 INFO L185 CegarLoopUtils]: At program point L30(lines 30 32) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (< main_~n~0 (+ main_~k~0 1)))) (and (<= (+ main_~n~0 1) main_~k~0) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0)))) [2021-02-21 21:30:17,180 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 36) the Hoare annotation is: true [2021-02-21 21:30:17,180 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-21 21:30:17,180 INFO L192 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: true [2021-02-21 21:30:17,181 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (= main_~i~0 0) [2021-02-21 21:30:17,181 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-02-21 21:30:17,181 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-21 21:30:17,181 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-02-21 21:30:17,181 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:30:17,181 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:30:17,181 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:30:17,182 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:30:17,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:30:17 BoogieIcfgContainer [2021-02-21 21:30:17,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:30:17,202 INFO L168 Benchmark]: Toolchain (without parser) took 29283.63 ms. Allocated memory was 162.5 MB in the beginning and 220.2 MB in the end (delta: 57.7 MB). Free memory was 138.2 MB in the beginning and 196.3 MB in the end (delta: -58.1 MB). Peak memory consumption was 129.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:30:17,203 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory is still 135.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:30:17,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.31 ms. Allocated memory is still 162.5 MB. Free memory was 136.9 MB in the beginning and 127.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:30:17,204 INFO L168 Benchmark]: Boogie Preprocessor took 31.23 ms. Allocated memory is still 162.5 MB. Free memory was 127.3 MB in the beginning and 125.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:30:17,204 INFO L168 Benchmark]: RCFGBuilder took 520.25 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 144.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:30:17,204 INFO L168 Benchmark]: TraceAbstraction took 28467.83 ms. Allocated memory was 162.5 MB in the beginning and 220.2 MB in the end (delta: 57.7 MB). Free memory was 143.6 MB in the beginning and 196.3 MB in the end (delta: -52.7 MB). Peak memory consumption was 134.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:30:17,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory is still 135.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.31 ms. Allocated memory is still 162.5 MB. Free memory was 136.9 MB in the beginning and 127.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.23 ms. Allocated memory is still 162.5 MB. Free memory was 127.3 MB in the beginning and 125.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 520.25 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 144.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28467.83 ms. Allocated memory was 162.5 MB in the beginning and 220.2 MB in the end (delta: 57.7 MB). Free memory was 143.6 MB in the beginning and 196.3 MB in the end (delta: -52.7 MB). Peak memory consumption was 134.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((2 * n <= i + 1 && i + 1 <= 2 * n) && n < k + 1) || (i == 0 && n == 0)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.2s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 278 SDtfs, 507 SDslu, 1071 SDs, 0 SdLazy, 2209 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=9, 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, 10 MinimizatonAttempts, 35 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 40 LocationsWithAnnotation, 110 PreInvPairs, 178 NumberOfFragments, 448 HoareAnnotationTreeSize, 110 FomulaSimplifications, 20967 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 40 FomulaSimplificationsInter, 1370 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, 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 correct! Received shutdown request...