/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:17:45,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:17:45,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:17:45,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:17:45,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:17:45,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:17:45,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:17:45,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:17:45,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:17:45,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:17:45,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:17:45,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:17:45,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:17:45,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:17:45,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:17:45,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:17:45,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:17:45,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:17:45,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:17:45,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:17:45,367 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 21:17:45,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:17:45,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:17:45,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:17:45,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:17:45,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:17:45,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:17:45,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:17:45,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:17:45,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:17:45,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:17:45,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:17:45,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:17:45,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:17:45,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:17:45,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:17:45,396 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:17:45,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:17:45,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:17:45,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:17:45,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:17:45,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:17:45,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:17:45,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:17:45,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:17:45,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:17:45,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:17:45,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:17:45,836 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:17:45,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2021-02-21 21:17:45,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9f89d130/e70800d041a949359090dfc82b4b7885/FLAG1d8dd9b42 [2021-02-21 21:17:46,552 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:17:46,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2021-02-21 21:17:46,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9f89d130/e70800d041a949359090dfc82b4b7885/FLAG1d8dd9b42 [2021-02-21 21:17:46,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9f89d130/e70800d041a949359090dfc82b4b7885 [2021-02-21 21:17:46,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:17:46,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:17:46,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:46,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:17:46,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:17:46,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:46" (1/1) ... [2021-02-21 21:17:46,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aba67d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:46, skipping insertion in model container [2021-02-21 21:17:46,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:46" (1/1) ... [2021-02-21 21:17:46,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:17:46,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:17:47,128 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821] [2021-02-21 21:17:47,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:47,149 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:17:47,164 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821] [2021-02-21 21:17:47,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:47,183 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:17:47,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47 WrapperNode [2021-02-21 21:17:47,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:47,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:17:47,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:17:47,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:17:47,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (1/1) ... [2021-02-21 21:17:47,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (1/1) ... [2021-02-21 21:17:47,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (1/1) ... [2021-02-21 21:17:47,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (1/1) ... [2021-02-21 21:17:47,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (1/1) ... [2021-02-21 21:17:47,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (1/1) ... [2021-02-21 21:17:47,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (1/1) ... [2021-02-21 21:17:47,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:17:47,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:17:47,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:17:47,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:17:47,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (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 21:17:47,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:17:47,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:17:47,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:17:47,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:17:47,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:17:47,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:17:47,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:17:47,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:17:47,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:17:47,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:17:47,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:17:47,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:17:47,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:17:47,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:17:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:17:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:17:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:17:47,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:17:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:17:47,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:17:47,792 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:17:47,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:47 BoogieIcfgContainer [2021-02-21 21:17:47,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:17:47,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:17:47,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:17:47,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:17:47,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:46" (1/3) ... [2021-02-21 21:17:47,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed654d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:47, skipping insertion in model container [2021-02-21 21:17:47,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:47" (2/3) ... [2021-02-21 21:17:47,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed654d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:47, skipping insertion in model container [2021-02-21 21:17:47,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:47" (3/3) ... [2021-02-21 21:17:47,812 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2021-02-21 21:17:47,819 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:17:47,824 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:17:47,843 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:17:47,905 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:17:47,908 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:17:47,908 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:17:47,908 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:17:47,908 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:17:47,909 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:17:47,909 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:17:47,909 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:17:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-02-21 21:17:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 21:17:47,953 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:47,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:47,954 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2079068707, now seen corresponding path program 1 times [2021-02-21 21:17:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:47,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839514448] [2021-02-21 21:17:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:48,057 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:48,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:48,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:17:48,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:48,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:48,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:48,415 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 21:17:48,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839514448] [2021-02-21 21:17:48,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:48,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:17:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463989614] [2021-02-21 21:17:48,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:17:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:17:48,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:17:48,444 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2021-02-21 21:17:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:48,697 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-02-21 21:17:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:17:48,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 21:17:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:48,706 INFO L225 Difference]: With dead ends: 54 [2021-02-21 21:17:48,706 INFO L226 Difference]: Without dead ends: 30 [2021-02-21 21:17:48,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:17:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-21 21:17:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-02-21 21:17:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-21 21:17:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-02-21 21:17:48,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-02-21 21:17:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:48,756 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-02-21 21:17:48,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:17:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-02-21 21:17:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 21:17:48,757 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:48,757 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] [2021-02-21 21:17:48,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:17:48,758 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:48,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1153641451, now seen corresponding path program 1 times [2021-02-21 21:17:48,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:48,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187112085] [2021-02-21 21:17:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:50,909 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:17:50,945 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:17:50,946 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-21 21:17:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:50,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:50,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:50,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:50,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:17:51,001 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:17:51,002 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:17:51,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:51,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:51,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:51,069 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 21:17:51,087 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-02-21 21:17:51,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:51,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-02-21 21:17:51,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:51,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:17:51,314 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size 113 [2021-02-21 21:17:51,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:51,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-02-21 21:17:51,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-02-21 21:17:51,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:51,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-02-21 21:17:51,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-02-21 21:17:51,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:51,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:17:51,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-21 21:17:51,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:51,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:17:51,763 WARN L141 QuantifierPusher]: treesize reduction 14, result has 6.7 percent of original size [2021-02-21 21:17:51,764 WARN L147 QuantifierPusher]: treesize reduction 14, result has 6.7 percent of original size 1 [2021-02-21 21:17:51,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187112085] [2021-02-21 21:17:51,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:51,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:17:51,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981417464] [2021-02-21 21:17:51,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:17:51,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:17:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:17:51,767 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2021-02-21 21:17:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:52,179 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-02-21 21:17:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:17:52,180 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-02-21 21:17:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:52,181 INFO L225 Difference]: With dead ends: 43 [2021-02-21 21:17:52,181 INFO L226 Difference]: Without dead ends: 38 [2021-02-21 21:17:52,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:17:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-21 21:17:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-02-21 21:17:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-21 21:17:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-02-21 21:17:52,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2021-02-21 21:17:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:52,197 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-02-21 21:17:52,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:17:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-02-21 21:17:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 21:17:52,198 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:52,198 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] [2021-02-21 21:17:52,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:17:52,199 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1814353283, now seen corresponding path program 1 times [2021-02-21 21:17:52,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:52,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914204633] [2021-02-21 21:17:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:52,361 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-21 21:17:52,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:52,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-02-21 21:17:54,433 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:17:54,437 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:17:54,438 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:17:56,516 WARN L141 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size [2021-02-21 21:17:56,528 WARN L147 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size 81 [2021-02-21 21:17:56,529 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:17:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:56,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:56,622 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-21 21:17:56,623 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-21 21:17:56,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:17:56,627 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:17:56,628 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:17:56,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:56,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:56,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:56,659 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 21:17:56,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-02-21 21:17:56,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:56,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-21 21:17:56,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-21 21:17:56,684 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:17:56,685 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:17:56,685 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:17:56,686 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:17:56,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:17:56,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:56,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:17:56,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:56,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:17:56,716 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:17:56,717 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:17:56,718 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-21 21:17:56,718 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-21 21:17:56,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914204633] [2021-02-21 21:17:56,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:56,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 21:17:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988036603] [2021-02-21 21:17:56,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 21:17:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 21:17:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:17:56,721 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 7 states. [2021-02-21 21:17:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:56,874 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-02-21 21:17:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:17:56,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-02-21 21:17:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:56,876 INFO L225 Difference]: With dead ends: 53 [2021-02-21 21:17:56,876 INFO L226 Difference]: Without dead ends: 42 [2021-02-21 21:17:56,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:17:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-21 21:17:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-02-21 21:17:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 21:17:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-21 21:17:56,890 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2021-02-21 21:17:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:56,890 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-21 21:17:56,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 21:17:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-21 21:17:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:17:56,891 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:56,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:56,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:17:56,892 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash -177447861, now seen corresponding path program 2 times [2021-02-21 21:17:56,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:56,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939353387] [2021-02-21 21:17:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:57,051 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-21 21:17:57,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:57,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-02-21 21:17:59,141 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:17:59,146 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:17:59,147 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:01,211 WARN L141 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size [2021-02-21 21:18:01,215 WARN L147 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size 81 [2021-02-21 21:18:01,216 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:03,306 WARN L141 QuantifierPusher]: treesize reduction 28, result has 74.3 percent of original size [2021-02-21 21:18:03,311 WARN L147 QuantifierPusher]: treesize reduction 28, result has 74.3 percent of original size 81 [2021-02-21 21:18:03,312 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:03,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:03,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:03,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:03,357 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:03,357 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:03,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:03,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:03,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:03,393 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 21:18:03,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-02-21 21:18:03,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:03,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-21 21:18:03,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-21 21:18:03,416 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:03,417 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:03,418 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:03,418 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:03,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:03,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:03,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:03,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:03,451 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:03,452 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:03,453 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:03,453 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:03,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:03,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:03,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:03,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:03,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:03,500 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:03,501 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:03,502 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-21 21:18:03,502 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-21 21:18:03,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939353387] [2021-02-21 21:18:03,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:03,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:18:03,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029894889] [2021-02-21 21:18:03,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:18:03,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:03,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:18:03,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:18:03,505 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2021-02-21 21:18:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:03,868 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-02-21 21:18:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:18:03,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2021-02-21 21:18:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:03,872 INFO L225 Difference]: With dead ends: 59 [2021-02-21 21:18:03,872 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 21:18:03,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:18:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 21:18:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-02-21 21:18:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 21:18:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-21 21:18:03,901 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2021-02-21 21:18:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:03,901 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-21 21:18:03,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:18:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-21 21:18:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-21 21:18:03,906 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:03,906 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:03,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:18:03,906 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 72723731, now seen corresponding path program 3 times [2021-02-21 21:18:03,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:03,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067491901] [2021-02-21 21:18:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:04,088 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-21 21:18:04,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:04,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-02-21 21:18:06,194 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:18:06,198 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:18:06,199 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:08,264 WARN L141 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size [2021-02-21 21:18:08,269 WARN L147 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size 81 [2021-02-21 21:18:08,269 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:10,365 WARN L141 QuantifierPusher]: treesize reduction 28, result has 74.3 percent of original size [2021-02-21 21:18:10,370 WARN L147 QuantifierPusher]: treesize reduction 28, result has 74.3 percent of original size 81 [2021-02-21 21:18:10,370 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:10,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:10,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:10,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:10,411 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,412 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:10,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:10,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:10,445 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 21:18:10,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-02-21 21:18:10,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:10,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-21 21:18:10,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-21 21:18:10,469 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,469 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,470 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,471 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:10,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:10,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:10,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:10,504 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,504 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,505 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,506 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:10,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:10,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:10,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:10,547 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,548 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,558 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,559 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:10,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:10,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:10,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:10,625 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:10,626 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:10,627 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:10,628 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:10,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:10,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:10,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:10,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:10,679 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-21 21:18:10,681 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-21 21:18:10,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067491901] [2021-02-21 21:18:10,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:10,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:18:10,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645962900] [2021-02-21 21:18:10,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:18:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:10,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:18:10,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:18:10,683 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 16 states. [2021-02-21 21:18:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:11,347 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-02-21 21:18:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:18:11,348 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2021-02-21 21:18:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:11,350 INFO L225 Difference]: With dead ends: 69 [2021-02-21 21:18:11,350 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 21:18:11,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-02-21 21:18:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 21:18:11,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-21 21:18:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 21:18:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-02-21 21:18:11,364 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 42 [2021-02-21 21:18:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:11,365 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-02-21 21:18:11,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:18:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-02-21 21:18:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 21:18:11,366 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:11,366 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:11,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:18:11,367 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1514269509, now seen corresponding path program 4 times [2021-02-21 21:18:11,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:11,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241110436] [2021-02-21 21:18:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:11,551 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-21 21:18:11,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:11,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-02-21 21:18:13,627 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:18:13,631 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:18:13,632 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:15,710 WARN L141 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size [2021-02-21 21:18:15,714 WARN L147 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size 81 [2021-02-21 21:18:15,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:15,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:18:15,807 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:17,892 WARN L141 QuantifierPusher]: treesize reduction 101, result has 44.5 percent of original size [2021-02-21 21:18:17,896 WARN L147 QuantifierPusher]: treesize reduction 101, result has 44.5 percent of original size 81 [2021-02-21 21:18:17,896 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:17,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:17,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:17,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:17,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:17,937 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-21 21:18:17,938 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-21 21:18:17,945 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-21 21:18:17,946 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-21 21:18:17,947 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:17,947 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:17,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:17,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:17,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:17,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:17,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:17,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:17,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:17,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:17,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:18,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:18,005 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 21:18:18,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-02-21 21:18:18,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:18,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-02-21 21:18:18,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-02-21 21:18:18,033 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,033 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,035 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,036 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:18,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:18:18,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,111 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,111 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,112 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,113 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:18,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:18:18,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,192 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,193 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,193 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,194 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:18,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:18:18,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,307 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,308 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,309 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-21 21:18:18,310 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-21 21:18:18,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:18,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:18:18,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,384 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-21 21:18:18,384 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-21 21:18:18,385 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-21 21:18:18,386 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-21 21:18:18,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:18,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:18:18,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:18,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:18,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:18,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241110436] [2021-02-21 21:18:18,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:18,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-02-21 21:18:18,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119197437] [2021-02-21 21:18:18,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-21 21:18:18,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:18,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-21 21:18:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-02-21 21:18:18,480 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2021-02-21 21:18:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:19,747 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-02-21 21:18:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-21 21:18:19,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 47 [2021-02-21 21:18:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:19,750 INFO L225 Difference]: With dead ends: 68 [2021-02-21 21:18:19,750 INFO L226 Difference]: Without dead ends: 57 [2021-02-21 21:18:19,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-02-21 21:18:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-21 21:18:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-02-21 21:18:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-21 21:18:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-02-21 21:18:19,765 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 47 [2021-02-21 21:18:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:19,765 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-02-21 21:18:19,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-21 21:18:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-02-21 21:18:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-21 21:18:19,767 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:19,767 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:19,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:18:19,768 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:19,768 INFO L82 PathProgramCache]: Analyzing trace with hash -107037613, now seen corresponding path program 5 times [2021-02-21 21:18:19,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:19,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398770248] [2021-02-21 21:18:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:19,945 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-21 21:18:19,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:19,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-02-21 21:18:22,013 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:18:22,018 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:18:22,019 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:24,085 WARN L141 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size [2021-02-21 21:18:24,089 WARN L147 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size 81 [2021-02-21 21:18:24,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:24,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:18:24,183 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:26,277 WARN L141 QuantifierPusher]: treesize reduction 101, result has 44.5 percent of original size [2021-02-21 21:18:26,281 WARN L147 QuantifierPusher]: treesize reduction 101, result has 44.5 percent of original size 81 [2021-02-21 21:18:26,282 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:26,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:26,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:26,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:26,318 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,318 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:26,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:26,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:26,356 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 21:18:26,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-02-21 21:18:26,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:26,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-21 21:18:26,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-21 21:18:26,376 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,377 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,378 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,387 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:26,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:26,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,424 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,424 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,425 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,426 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:26,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:26,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,471 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,472 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,482 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,483 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:26,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:26,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,546 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,546 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,559 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:26,560 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:26,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:26,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:26,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,642 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,643 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,643 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:26,643 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:26,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:26,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:26,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,700 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:26,700 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:26,717 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:26,717 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:26,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:26,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:26,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:26,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:26,801 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-21 21:18:26,802 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-21 21:18:26,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398770248] [2021-02-21 21:18:26,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:26,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-21 21:18:26,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649639736] [2021-02-21 21:18:26,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-21 21:18:26,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:26,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-21 21:18:26,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-02-21 21:18:26,804 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2021-02-21 21:18:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:27,973 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-02-21 21:18:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 21:18:27,975 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2021-02-21 21:18:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:27,977 INFO L225 Difference]: With dead ends: 73 [2021-02-21 21:18:27,977 INFO L226 Difference]: Without dead ends: 62 [2021-02-21 21:18:27,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-02-21 21:18:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-21 21:18:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-02-21 21:18:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-21 21:18:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-02-21 21:18:27,993 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 52 [2021-02-21 21:18:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:27,994 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-02-21 21:18:27,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-21 21:18:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-02-21 21:18:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-21 21:18:27,995 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:27,995 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:27,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:18:27,995 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1350591493, now seen corresponding path program 6 times [2021-02-21 21:18:27,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:27,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180435993] [2021-02-21 21:18:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:28,167 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-21 21:18:28,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-02-21 21:18:30,246 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:18:30,250 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:18:30,251 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:32,321 WARN L141 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size [2021-02-21 21:18:32,324 WARN L147 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size 81 [2021-02-21 21:18:32,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:18:32,429 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:34,519 WARN L141 QuantifierPusher]: treesize reduction 101, result has 44.5 percent of original size [2021-02-21 21:18:34,524 WARN L147 QuantifierPusher]: treesize reduction 101, result has 44.5 percent of original size 81 [2021-02-21 21:18:34,525 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:34,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:34,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:34,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:34,561 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,562 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:34,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:34,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:34,595 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 21:18:34,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-02-21 21:18:34,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:34,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-21 21:18:34,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-21 21:18:34,617 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,618 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,618 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,618 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:34,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,651 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,652 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,652 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,653 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:34,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,702 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,703 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,703 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,704 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:34,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,753 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,754 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,766 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:34,767 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:34,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:34,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,833 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,834 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,846 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:34,847 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:34,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:34,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:34,917 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:34,918 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:34,933 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:34,934 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:34,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:35,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:35,028 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:35,029 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:35,029 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:35,030 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:35,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:35,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:35,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:35,109 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-21 21:18:35,109 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-21 21:18:35,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180435993] [2021-02-21 21:18:35,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:35,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-02-21 21:18:35,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110889257] [2021-02-21 21:18:35,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-21 21:18:35,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:35,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-21 21:18:35,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-02-21 21:18:35,111 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 25 states. [2021-02-21 21:18:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:36,498 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-02-21 21:18:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-21 21:18:36,498 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2021-02-21 21:18:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:36,500 INFO L225 Difference]: With dead ends: 78 [2021-02-21 21:18:36,500 INFO L226 Difference]: Without dead ends: 67 [2021-02-21 21:18:36,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-02-21 21:18:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-21 21:18:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-02-21 21:18:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-21 21:18:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-02-21 21:18:36,522 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 57 [2021-02-21 21:18:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:36,522 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-02-21 21:18:36,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-21 21:18:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-02-21 21:18:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-21 21:18:36,529 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:36,530 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:36,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:18:36,530 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1196276627, now seen corresponding path program 7 times [2021-02-21 21:18:36,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:36,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842947548] [2021-02-21 21:18:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:36,718 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-21 21:18:36,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-02-21 21:18:38,805 WARN L141 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-02-21 21:18:38,808 WARN L147 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size 76 [2021-02-21 21:18:38,808 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:40,876 WARN L141 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size [2021-02-21 21:18:40,879 WARN L147 QuantifierPusher]: treesize reduction 23, result has 77.9 percent of original size 81 [2021-02-21 21:18:40,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:40,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:18:40,988 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:43,072 WARN L141 QuantifierPusher]: treesize reduction 28, result has 74.3 percent of original size [2021-02-21 21:18:43,076 WARN L147 QuantifierPusher]: treesize reduction 28, result has 74.3 percent of original size 81 [2021-02-21 21:18:43,076 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:18:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:43,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:43,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:43,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:43,110 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,110 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:43,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:43,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:43,144 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 21:18:43,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-02-21 21:18:43,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:43,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-21 21:18:43,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-21 21:18:43,163 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,163 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,164 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,164 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,196 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,197 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,197 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,198 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,236 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,237 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,247 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,247 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,314 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,315 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,330 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:43,330 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:43,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,409 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,410 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,411 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:43,411 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:43,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,471 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,472 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,472 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:43,472 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:43,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,535 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,535 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,536 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:43,536 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:43,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,615 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:18:43,616 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:18:43,637 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:43,638 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:43,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:43,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:18:43,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:18:43,746 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-21 21:18:43,746 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-21 21:18:43,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:43,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 21:18:43,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:18:43,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:43,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 21:18:43,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-21 21:18:43,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:43,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:43,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 21:18:43,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-21 21:18:43,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842947548] [2021-02-21 21:18:43,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:43,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-02-21 21:18:43,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685084100] [2021-02-21 21:18:43,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-21 21:18:43,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:43,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-21 21:18:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 21:18:43,887 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 31 states. [2021-02-21 21:18:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:45,602 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-02-21 21:18:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-21 21:18:45,602 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 62 [2021-02-21 21:18:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:45,603 INFO L225 Difference]: With dead ends: 73 [2021-02-21 21:18:45,603 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:18:45,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=3392, Unknown=0, NotChecked=0, Total=3660 [2021-02-21 21:18:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:18:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:18:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:18:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:18:45,606 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-02-21 21:18:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:45,606 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:18:45,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-02-21 21:18:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:18:45,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:18:45,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:18:45,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:18:46,196 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-02-21 21:18:46,418 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-02-21 21:18:46,707 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-02-21 21:18:46,960 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-02-21 21:18:47,147 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2021-02-21 21:18:47,310 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2021-02-21 21:18:47,321 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-21 21:18:47,322 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-21 21:18:47,322 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-21 21:18:47,322 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-21 21:18:47,322 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-21 21:18:47,322 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:18:47,322 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:18:47,322 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-21 21:18:47,322 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-21 21:18:47,322 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-21 21:18:47,322 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-21 21:18:47,323 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 21:18:47,323 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-21 21:18:47,323 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:18:47,323 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:18:47,323 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:18:47,323 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:18:47,323 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:18:47,323 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 22 29) the Hoare annotation is: true [2021-02-21 21:18:47,324 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (or (and (= main_~sn~0 4) (= main_~i~0 3)) (and (= main_~i~0 2) (= 2 main_~sn~0)) (and (= main_~sn~0 0) (= main_~i~0 1))) [2021-02-21 21:18:47,324 INFO L185 CegarLoopUtils]: At program point L25(lines 25 26) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 4) .cse0) (and (= main_~sn~0 4) (= main_~i~0 3)) (= 7 main_~i~0) (and (= main_~i~0 2) (= 2 main_~sn~0)) (= main_~i~0 8) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (= 5 main_~i~0) .cse0) (and (= main_~i~0 6) .cse0))) [2021-02-21 21:18:47,324 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 22 29) the Hoare annotation is: true [2021-02-21 21:18:47,324 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (= main_~sn~0 0) [2021-02-21 21:18:47,324 INFO L192 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-02-21 21:18:47,324 INFO L185 CegarLoopUtils]: At program point L24-3(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 4) .cse0) (= 7 main_~i~0) (= main_~i~0 8) (and (= main_~i~0 1) (= 2 main_~sn~0)) (= main_~i~0 6) (and .cse0 (= main_~i~0 3)) (and (= main_~sn~0 4) (= main_~i~0 2)) (and (= 5 main_~i~0) .cse0))) [2021-02-21 21:18:47,325 INFO L185 CegarLoopUtils]: At program point L24-4(line 24) the Hoare annotation is: (let ((.cse4 (= main_~i~0 1))) (let ((.cse1 (or (<= 2 main_~i~0) .cse4)) (.cse2 (< main_~i~0 4)) (.cse0 (= |main_#t~post3| main_~i~0)) (.cse3 (= 6 main_~sn~0))) (or (and .cse0 (= main_~i~0 6)) (and (= 7 main_~i~0) .cse0) (and .cse0 .cse1 .cse2 .cse3 (= main_~i~0 3)) (and .cse0 .cse4 .cse1 .cse2 (= 2 main_~sn~0)) (and (= main_~sn~0 4) (= main_~i~0 2) .cse0 .cse1 .cse2) (and .cse0 (= main_~i~0 8)) (and .cse0 (= 5 main_~i~0) .cse3) (and (= main_~i~0 4) .cse0 .cse3)))) [2021-02-21 21:18:47,325 INFO L185 CegarLoopUtils]: At program point L24-5(line 24) the Hoare annotation is: (let ((.cse0 (= (+ |main_#t~post3| 1) main_~i~0)) (.cse1 (= 6 main_~sn~0))) (or (and .cse0 (= 2 main_~sn~0) (= |main_#t~post3| 1)) (and .cse0 (= |main_#t~post3| 7)) (and (= |main_#t~post3| 6) .cse0) (and .cse0 (= |main_#t~post3| 8)) (and (= main_~sn~0 4) (= |main_#t~post3| 2) .cse0) (and .cse0 (= |main_#t~post3| 4) .cse1) (and (= |main_#t~post3| 3) .cse0 .cse1) (and .cse0 (= |main_#t~post3| 5) .cse1))) [2021-02-21 21:18:47,325 INFO L185 CegarLoopUtils]: At program point L24-6(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 4) .cse0) (and (= main_~sn~0 4) (= main_~i~0 3)) (= 7 main_~i~0) (and (= main_~i~0 2) (= 2 main_~sn~0)) (= main_~i~0 8) (and (= main_~sn~0 0) (= main_~i~0 1)) (= main_~i~0 9) (and (= 5 main_~i~0) .cse0) (and (= main_~i~0 6) .cse0))) [2021-02-21 21:18:47,325 INFO L185 CegarLoopUtils]: At program point L24-7(lines 24 27) the Hoare annotation is: (= main_~i~0 9) [2021-02-21 21:18:47,325 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 22 29) the Hoare annotation is: true [2021-02-21 21:18:47,325 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (or (forall ((v_main_~sn~0_117 Int)) (not (= (ite (or (= v_main_~sn~0_117 16) (= v_main_~sn~0_117 0)) 1 0) |__VERIFIER_assert_#in~cond|))) (not (= main_~i~0 9)) (and (= __VERIFIER_assert_~cond 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2021-02-21 21:18:47,326 INFO L185 CegarLoopUtils]: At program point L15(lines 15 17) the Hoare annotation is: (or (forall ((v_main_~sn~0_117 Int)) (not (= (ite (or (= v_main_~sn~0_117 16) (= v_main_~sn~0_117 0)) 1 0) |__VERIFIER_assert_#in~cond|))) (not (= main_~i~0 9)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2021-02-21 21:18:47,326 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (or (forall ((v_main_~sn~0_117 Int)) (not (= (ite (or (= v_main_~sn~0_117 16) (= v_main_~sn~0_117 0)) 1 0) |__VERIFIER_assert_#in~cond|))) (not (= main_~i~0 9))) [2021-02-21 21:18:47,326 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2021-02-21 21:18:47,326 INFO L192 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-02-21 21:18:47,326 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2021-02-21 21:18:47,326 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (or (forall ((v_main_~sn~0_117 Int)) (not (= (ite (or (= v_main_~sn~0_117 16) (= v_main_~sn~0_117 0)) 1 0) |__VERIFIER_assert_#in~cond|))) (not (= main_~i~0 9))) [2021-02-21 21:18:47,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:18:47 BoogieIcfgContainer [2021-02-21 21:18:47,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:18:47,348 INFO L168 Benchmark]: Toolchain (without parser) took 60413.56 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 130.1 MB in the beginning and 150.4 MB in the end (delta: -20.3 MB). Peak memory consumption was 106.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:47,348 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:18:47,348 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.05 ms. Allocated memory is still 154.1 MB. Free memory was 129.0 MB in the beginning and 119.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:47,348 INFO L168 Benchmark]: Boogie Preprocessor took 35.24 ms. Allocated memory is still 154.1 MB. Free memory was 119.7 MB in the beginning and 118.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:47,349 INFO L168 Benchmark]: RCFGBuilder took 573.41 ms. Allocated memory is still 154.1 MB. Free memory was 118.3 MB in the beginning and 104.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:47,349 INFO L168 Benchmark]: TraceAbstraction took 59550.80 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 104.2 MB in the beginning and 150.4 MB in the end (delta: -46.1 MB). Peak memory consumption was 79.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:47,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 230.05 ms. Allocated memory is still 154.1 MB. Free memory was 129.0 MB in the beginning and 119.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.24 ms. Allocated memory is still 154.1 MB. Free memory was 119.7 MB in the beginning and 118.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 573.41 ms. Allocated memory is still 154.1 MB. Free memory was 118.3 MB in the beginning and 104.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 59550.80 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 104.2 MB in the beginning and 150.4 MB in the end (delta: -46.1 MB). Peak memory consumption was 79.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 24]: Loop Invariant Derived loop invariant: ((((((((i == 4 && 6 == sn) || (sn == 4 && i == 3)) || 7 == i) || (i == 2 && 2 == sn)) || i == 8) || (sn == 0 && i == 1)) || i == 9) || (5 == i && 6 == sn)) || (i == 6 && 6 == sn) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 57.7s, OverallIterations: 9, TraceHistogramMax: 8, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 238 SDtfs, 386 SDslu, 989 SDs, 0 SdLazy, 3464 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 420 GetRequests, 135 SyntacticMatches, 21 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 95 PreInvPairs, 162 NumberOfFragments, 494 HoareAnnotationTreeSize, 95 FomulaSimplifications, 17154 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 32 FomulaSimplificationsInter, 2183 FormulaSimplificationTreeSizeReductionInter, 1.3s 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...