/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-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:33:28,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:33:28,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:33:28,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:33:28,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:33:28,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:33:28,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:33:28,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:33:28,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:33:28,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:33:28,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:33:28,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:33:28,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:33:28,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:33:28,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:33:28,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:33:28,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:33:28,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:33:28,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:33:28,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:33:28,567 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 21:33:28,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:33:28,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:33:28,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:33:28,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:33:28,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:33:28,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:33:28,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:33:28,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:33:28,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:33:28,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:33:28,598 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:33:28,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:33:28,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:33:28,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:33:28,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:33:28,599 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:33:28,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:33:28,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:33:28,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:33:28,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:33:28,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:33:28,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:33:28,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:33:29,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:33:29,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:33:29,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:33:29,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:33:29,040 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:33:29,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-02-21 21:33:29,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d222ee6/651ae3c1ae914929a94ea802ae1366ec/FLAGa2c053e22 [2021-02-21 21:33:29,574 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:33:29,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-02-21 21:33:29,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d222ee6/651ae3c1ae914929a94ea802ae1366ec/FLAGa2c053e22 [2021-02-21 21:33:29,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d222ee6/651ae3c1ae914929a94ea802ae1366ec [2021-02-21 21:33:29,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:33:29,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:33:29,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:33:29,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:33:29,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:33:29,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:33:29" (1/1) ... [2021-02-21 21:33:29,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2095d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:29, skipping insertion in model container [2021-02-21 21:33:29,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:33:29" (1/1) ... [2021-02-21 21:33:29,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:33:30,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:33:30,221 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-crafted-1/sumt9.c[403,416] [2021-02-21 21:33:30,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:33:30,252 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:33:30,266 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-crafted-1/sumt9.c[403,416] [2021-02-21 21:33:30,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:33:30,294 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:33:30,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30 WrapperNode [2021-02-21 21:33:30,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:33:30,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:33:30,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:33:30,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:33:30,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (1/1) ... [2021-02-21 21:33:30,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (1/1) ... [2021-02-21 21:33:30,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (1/1) ... [2021-02-21 21:33:30,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (1/1) ... [2021-02-21 21:33:30,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (1/1) ... [2021-02-21 21:33:30,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (1/1) ... [2021-02-21 21:33:30,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (1/1) ... [2021-02-21 21:33:30,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:33:30,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:33:30,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:33:30,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:33:30,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (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 21:33:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:33:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:33:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:33:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:33:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:33:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:33:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:33:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:33:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:33:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:33:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:33:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:33:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:33:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:33:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:33:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:33:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:33:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:33:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:33:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:33:30,996 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:33:30,996 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:33:30,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:33:30 BoogieIcfgContainer [2021-02-21 21:33:30,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:33:31,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:33:31,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:33:31,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:33:31,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:33:29" (1/3) ... [2021-02-21 21:33:31,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171388ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:33:31, skipping insertion in model container [2021-02-21 21:33:31,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:30" (2/3) ... [2021-02-21 21:33:31,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171388ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:33:31, skipping insertion in model container [2021-02-21 21:33:31,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:33:30" (3/3) ... [2021-02-21 21:33:31,017 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.c [2021-02-21 21:33:31,024 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:33:31,029 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:33:31,045 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:33:31,067 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:33:31,068 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:33:31,068 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:33:31,068 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:33:31,068 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:33:31,068 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:33:31,068 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:33:31,068 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:33:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2021-02-21 21:33:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:33:31,094 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:31,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:31,095 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1856204290, now seen corresponding path program 1 times [2021-02-21 21:33:31,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:31,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019442436] [2021-02-21 21:33:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:31,186 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:31,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:31,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:31,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:31,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:31,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:31,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:31,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:33:31,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:33:31,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:33:31,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:33:31,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:33:31,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:31,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:33:31,985 WARN L141 QuantifierPusher]: treesize reduction 4, result has 98.1 percent of original size [2021-02-21 21:33:32,005 WARN L147 QuantifierPusher]: treesize reduction 4, result has 98.1 percent of original size 210 [2021-02-21 21:33:32,160 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-21 21:33:32,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:32,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:32,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:32,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:32,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:32,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:32,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:32,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:32,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:32,307 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 21:33:32,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019442436] [2021-02-21 21:33:32,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:32,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:33:32,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067709062] [2021-02-21 21:33:32,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:33:32,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:32,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:33:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:33:32,337 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 17 states. [2021-02-21 21:33:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:33,929 INFO L93 Difference]: Finished difference Result 194 states and 267 transitions. [2021-02-21 21:33:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:33:33,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2021-02-21 21:33:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:33,942 INFO L225 Difference]: With dead ends: 194 [2021-02-21 21:33:33,943 INFO L226 Difference]: Without dead ends: 141 [2021-02-21 21:33:33,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-02-21 21:33:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-21 21:33:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 63. [2021-02-21 21:33:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 21:33:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-02-21 21:33:34,050 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 36 [2021-02-21 21:33:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:34,053 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-02-21 21:33:34,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:33:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-02-21 21:33:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 21:33:34,057 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:34,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:34,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:33:34,058 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1088228868, now seen corresponding path program 1 times [2021-02-21 21:33:34,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:34,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890839052] [2021-02-21 21:33:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:42,057 WARN L202 SmtUtils]: Spent 7.95 s on a formula simplification. DAG size of input: 540 DAG size of output: 303 [2021-02-21 21:33:42,074 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:42,077 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:42,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:42,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:42,185 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-21 21:33:42,188 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-21 21:33:42,244 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:33:42,250 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-21 21:33:42,263 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-21 21:33:42,264 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-21 21:33:42,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:42,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:42,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:42,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:33:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:42,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:42,366 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 21:33:42,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890839052] [2021-02-21 21:33:42,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:42,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:42,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281797736] [2021-02-21 21:33:42,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:42,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:42,373 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 5 states. [2021-02-21 21:33:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:42,791 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2021-02-21 21:33:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:42,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-02-21 21:33:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:42,793 INFO L225 Difference]: With dead ends: 107 [2021-02-21 21:33:42,793 INFO L226 Difference]: Without dead ends: 81 [2021-02-21 21:33:42,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-21 21:33:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-02-21 21:33:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-21 21:33:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-02-21 21:33:42,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 45 [2021-02-21 21:33:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:42,825 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-02-21 21:33:42,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-02-21 21:33:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-21 21:33:42,827 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:42,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:42,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:33:42,827 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:42,828 INFO L82 PathProgramCache]: Analyzing trace with hash -751621844, now seen corresponding path program 1 times [2021-02-21 21:33:42,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:42,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988207307] [2021-02-21 21:33:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:53,883 WARN L202 SmtUtils]: Spent 1.18 m on a formula simplification. DAG size of input: 44888 DAG size of output: 299 [2021-02-21 21:34:53,892 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:53,899 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:53,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:53,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:53,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:53,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:34:54,002 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:34:54,003 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:34:54,022 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:34:54,023 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:34:54,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:54,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:54,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:54,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:54,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:54,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:34:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:54,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:54,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:54,083 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 21:34:54,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988207307] [2021-02-21 21:34:54,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:54,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:34:54,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907544413] [2021-02-21 21:34:54,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:34:54,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:54,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:34:54,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:34:54,086 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 5 states. [2021-02-21 21:34:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:54,392 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2021-02-21 21:34:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:34:54,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-02-21 21:34:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:54,395 INFO L225 Difference]: With dead ends: 106 [2021-02-21 21:34:54,395 INFO L226 Difference]: Without dead ends: 80 [2021-02-21 21:34:54,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:34:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-21 21:34:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-02-21 21:34:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-21 21:34:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-02-21 21:34:54,437 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 46 [2021-02-21 21:34:54,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:54,437 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-02-21 21:34:54,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:34:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-02-21 21:34:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 21:34:54,439 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:54,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:34:54,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:34:54,440 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:54,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1780644162, now seen corresponding path program 1 times [2021-02-21 21:34:54,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:54,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360244121] [2021-02-21 21:34:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:59,511 WARN L202 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 540 DAG size of output: 248 [2021-02-21 21:34:59,517 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:59,520 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:59,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:59,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:59,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:59,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:34:59,668 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-21 21:34:59,669 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-21 21:34:59,716 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:34:59,718 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-21 21:34:59,731 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-21 21:34:59,732 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-21 21:34:59,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:59,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:59,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:59,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:59,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:59,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:34:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:59,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:59,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:59,787 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 21:34:59,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360244121] [2021-02-21 21:34:59,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:59,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:34:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809036683] [2021-02-21 21:34:59,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:34:59,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:59,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:34:59,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:34:59,790 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 5 states. [2021-02-21 21:35:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:00,171 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2021-02-21 21:35:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:35:00,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2021-02-21 21:35:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:00,174 INFO L225 Difference]: With dead ends: 105 [2021-02-21 21:35:00,174 INFO L226 Difference]: Without dead ends: 79 [2021-02-21 21:35:00,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:35:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-21 21:35:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-02-21 21:35:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-21 21:35:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-02-21 21:35:00,202 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 47 [2021-02-21 21:35:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:00,202 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-02-21 21:35:00,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:35:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-02-21 21:35:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:35:00,203 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:00,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:00,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:35:00,204 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash 851177254, now seen corresponding path program 1 times [2021-02-21 21:35:00,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:00,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578865361] [2021-02-21 21:35:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:20,974 WARN L202 SmtUtils]: Spent 20.69 s on a formula simplification. DAG size of input: 12632 DAG size of output: 237 [2021-02-21 21:35:20,979 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:35:20,980 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:21,053 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:35:21,058 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:35:21,081 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:35:21,082 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:35:21,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:21,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:35:21,121 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-21 21:35:21,123 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 109 [2021-02-21 21:35:21,196 WARN L141 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size [2021-02-21 21:35:21,198 WARN L147 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size 115 [2021-02-21 21:35:21,229 WARN L141 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size [2021-02-21 21:35:21,230 WARN L147 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size 99 [2021-02-21 21:35:21,296 WARN L141 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size [2021-02-21 21:35:21,297 WARN L147 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size 86 [2021-02-21 21:35:21,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:21,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:21,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:21,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:21,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:21,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:35:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:21,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:21,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:21,386 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 21:35:21,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578865361] [2021-02-21 21:35:21,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:21,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:35:21,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872926518] [2021-02-21 21:35:21,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:35:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:35:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:35:21,389 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 9 states. [2021-02-21 21:35:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:22,303 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2021-02-21 21:35:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:35:22,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2021-02-21 21:35:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:22,306 INFO L225 Difference]: With dead ends: 104 [2021-02-21 21:35:22,306 INFO L226 Difference]: Without dead ends: 78 [2021-02-21 21:35:22,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:35:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-21 21:35:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2021-02-21 21:35:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-21 21:35:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-02-21 21:35:22,336 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 48 [2021-02-21 21:35:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:22,336 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-02-21 21:35:22,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:35:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-02-21 21:35:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 21:35:22,338 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:22,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:22,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:35:22,338 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1005037432, now seen corresponding path program 1 times [2021-02-21 21:35:22,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:22,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879499057] [2021-02-21 21:35:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:27,574 WARN L202 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 540 DAG size of output: 248 [2021-02-21 21:35:27,581 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:35:27,583 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:27,668 WARN L141 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size [2021-02-21 21:35:27,669 WARN L147 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size 15 [2021-02-21 21:35:27,684 WARN L141 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size [2021-02-21 21:35:27,686 WARN L147 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size 18 [2021-02-21 21:35:27,712 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-21 21:35:27,715 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-21 21:35:27,740 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-21 21:35:27,742 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-21 21:35:27,772 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-21 21:35:27,774 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-21 21:35:27,815 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-21 21:35:27,816 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-21 21:35:27,867 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-21 21:35:27,869 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-21 21:35:27,927 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-21 21:35:27,928 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-21 21:35:27,996 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-21 21:35:27,997 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-21 21:35:28,074 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size [2021-02-21 21:35:28,075 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size 42 [2021-02-21 21:35:28,161 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size [2021-02-21 21:35:28,163 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size 45 [2021-02-21 21:35:28,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:28,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 21:35:28,305 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size [2021-02-21 21:35:28,309 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size 108 [2021-02-21 21:35:28,425 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.7 percent of original size [2021-02-21 21:35:28,428 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.7 percent of original size 227 [2021-02-21 21:35:28,628 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-02-21 21:35:28,634 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size [2021-02-21 21:35:28,639 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size 276 [2021-02-21 21:35:28,695 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size [2021-02-21 21:35:28,698 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size 260 [2021-02-21 21:35:28,848 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-02-21 21:35:28,857 WARN L141 QuantifierPusher]: treesize reduction 3, result has 99.1 percent of original size [2021-02-21 21:35:28,860 WARN L147 QuantifierPusher]: treesize reduction 3, result has 99.1 percent of original size 324 [2021-02-21 21:35:28,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:28,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-21 21:35:28,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:28,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:28,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:28,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:28,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:28,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:28,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:28,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:35:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:28,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:28,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:28,993 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 21:35:28,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879499057] [2021-02-21 21:35:28,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:28,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 21:35:28,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72938638] [2021-02-21 21:35:28,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 21:35:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 21:35:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:35:28,996 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 19 states. [2021-02-21 21:35:29,701 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-21 21:35:29,839 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-21 21:35:29,986 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-21 21:35:30,142 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-21 21:35:30,311 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-21 21:35:30,505 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-21 21:35:30,717 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-21 21:35:30,943 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-02-21 21:35:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:31,698 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2021-02-21 21:35:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:35:31,699 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2021-02-21 21:35:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:31,704 INFO L225 Difference]: With dead ends: 162 [2021-02-21 21:35:31,704 INFO L226 Difference]: Without dead ends: 136 [2021-02-21 21:35:31,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 21:35:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-21 21:35:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 69. [2021-02-21 21:35:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-02-21 21:35:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-02-21 21:35:31,763 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 49 [2021-02-21 21:35:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:31,763 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-02-21 21:35:31,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 21:35:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-02-21 21:35:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-21 21:35:31,764 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:31,764 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:31,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:35:31,765 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1651510560, now seen corresponding path program 1 times [2021-02-21 21:35:31,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:31,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724999763] [2021-02-21 21:35:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:37,189 WARN L202 SmtUtils]: Spent 5.40 s on a formula simplification. DAG size of input: 540 DAG size of output: 248 [2021-02-21 21:35:37,197 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:35:37,198 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:37,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:37,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:37,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:37,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:37,236 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:35:37,237 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:35:37,256 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:35:37,257 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:35:37,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:37,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:37,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:37,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:37,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:37,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:35:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:37,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:37,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:37,304 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 21:35:37,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724999763] [2021-02-21 21:35:37,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:37,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:35:37,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372073951] [2021-02-21 21:35:37,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:35:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:35:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:35:37,306 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 5 states. [2021-02-21 21:35:37,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:37,652 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2021-02-21 21:35:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:35:37,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2021-02-21 21:35:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:37,655 INFO L225 Difference]: With dead ends: 102 [2021-02-21 21:35:37,655 INFO L226 Difference]: Without dead ends: 76 [2021-02-21 21:35:37,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:35:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-21 21:35:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-02-21 21:35:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-02-21 21:35:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-02-21 21:35:37,683 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 50 [2021-02-21 21:35:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:37,684 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-02-21 21:35:37,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:35:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-02-21 21:35:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-21 21:35:37,685 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:37,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:37,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:35:37,685 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:37,686 INFO L82 PathProgramCache]: Analyzing trace with hash 389115954, now seen corresponding path program 1 times [2021-02-21 21:35:37,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:37,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858144881] [2021-02-21 21:35:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:38:15,848 WARN L202 SmtUtils]: Spent 2.63 m on a formula simplification. DAG size of input: 44888 DAG size of output: 271 [2021-02-21 21:38:15,855 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:38:15,857 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:38:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:15,956 WARN L141 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size [2021-02-21 21:38:15,957 WARN L147 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size 15 [2021-02-21 21:38:15,974 WARN L141 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size [2021-02-21 21:38:15,975 WARN L147 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size 18 [2021-02-21 21:38:15,996 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-21 21:38:15,996 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-21 21:38:16,022 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-21 21:38:16,023 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-21 21:38:16,059 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-21 21:38:16,060 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-21 21:38:16,106 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-21 21:38:16,107 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-21 21:38:16,162 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-21 21:38:16,163 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-21 21:38:16,226 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-21 21:38:16,227 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-21 21:38:16,300 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-21 21:38:16,302 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-21 21:38:16,373 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size [2021-02-21 21:38:16,375 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size 42 [2021-02-21 21:38:16,463 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size [2021-02-21 21:38:16,467 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size 45 [2021-02-21 21:38:16,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:16,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 21:38:16,616 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size [2021-02-21 21:38:16,617 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size 108 [2021-02-21 21:38:16,749 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-21 21:38:16,755 WARN L141 QuantifierPusher]: treesize reduction 2, result has 99.1 percent of original size [2021-02-21 21:38:16,757 WARN L147 QuantifierPusher]: treesize reduction 2, result has 99.1 percent of original size 227 [2021-02-21 21:38:16,971 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-02-21 21:38:16,977 WARN L141 QuantifierPusher]: treesize reduction 2, result has 99.3 percent of original size [2021-02-21 21:38:16,978 WARN L147 QuantifierPusher]: treesize reduction 2, result has 99.3 percent of original size 270 [2021-02-21 21:38:17,166 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-02-21 21:38:17,173 WARN L141 QuantifierPusher]: treesize reduction 2, result has 99.2 percent of original size [2021-02-21 21:38:17,176 WARN L147 QuantifierPusher]: treesize reduction 2, result has 99.2 percent of original size 254 [2021-02-21 21:38:17,330 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-02-21 21:38:17,333 WARN L141 QuantifierPusher]: treesize reduction 17, result has 89.2 percent of original size [2021-02-21 21:38:17,335 WARN L147 QuantifierPusher]: treesize reduction 17, result has 89.2 percent of original size 140 [2021-02-21 21:38:17,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:17,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-21 21:38:17,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:17,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:17,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:38:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:17,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:17,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:17,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:17,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:38:17,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:38:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:17,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:17,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:17,486 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 21:38:17,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858144881] [2021-02-21 21:38:17,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:38:17,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-21 21:38:17,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273172358] [2021-02-21 21:38:17,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-21 21:38:17,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:38:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-21 21:38:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:38:17,489 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 20 states. [2021-02-21 21:38:18,224 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-21 21:38:18,368 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-21 21:38:18,531 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-21 21:38:18,689 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-21 21:38:18,859 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-21 21:38:19,070 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-21 21:38:19,312 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-21 21:38:19,655 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2021-02-21 21:38:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:38:20,327 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2021-02-21 21:38:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:38:20,329 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2021-02-21 21:38:20,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:38:20,330 INFO L225 Difference]: With dead ends: 140 [2021-02-21 21:38:20,330 INFO L226 Difference]: Without dead ends: 114 [2021-02-21 21:38:20,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2021-02-21 21:38:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-02-21 21:38:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2021-02-21 21:38:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-21 21:38:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-02-21 21:38:20,366 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 51 [2021-02-21 21:38:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:38:20,366 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-02-21 21:38:20,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-21 21:38:20,366 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-02-21 21:38:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-21 21:38:20,367 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:38:20,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:38:20,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:38:20,368 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:38:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:38:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 81363738, now seen corresponding path program 1 times [2021-02-21 21:38:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:38:20,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429083057] [2021-02-21 21:38:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:38:25,581 WARN L202 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 540 DAG size of output: 242 [2021-02-21 21:38:25,585 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:38:25,587 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:38:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:25,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:25,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:25,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:25,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:38:25,625 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:38:25,626 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:38:25,646 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:38:25,647 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:38:25,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:25,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:25,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:38:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:25,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:25,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:25,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:38:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:25,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:25,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:25,695 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 21:38:25,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429083057] [2021-02-21 21:38:25,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:38:25,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:38:25,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056299112] [2021-02-21 21:38:25,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:38:25,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:38:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:38:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:38:25,697 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 5 states. [2021-02-21 21:38:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:38:26,055 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2021-02-21 21:38:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:38:26,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2021-02-21 21:38:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:38:26,058 INFO L225 Difference]: With dead ends: 100 [2021-02-21 21:38:26,058 INFO L226 Difference]: Without dead ends: 74 [2021-02-21 21:38:26,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:38:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-21 21:38:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-02-21 21:38:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-02-21 21:38:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-02-21 21:38:26,092 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 52 [2021-02-21 21:38:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:38:26,093 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-02-21 21:38:26,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:38:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-02-21 21:38:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-21 21:38:26,094 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:38:26,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:38:26,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:38:26,094 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:38:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:38:26,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1465205062, now seen corresponding path program 1 times [2021-02-21 21:38:26,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:38:26,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065726658] [2021-02-21 21:38:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:38:31,433 WARN L202 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 540 DAG size of output: 242 [2021-02-21 21:38:31,437 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:38:31,438 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:38:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:31,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:31,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:38:31,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:38:31,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:38:31,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:38:31,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:38:31,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:38:31,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:38:31,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:38:31,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:38:31,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:38:31,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:38:31,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:38:31,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:31,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-21 21:38:31,858 WARN L141 QuantifierPusher]: treesize reduction 4, result has 98.2 percent of original size [2021-02-21 21:38:31,861 WARN L147 QuantifierPusher]: treesize reduction 4, result has 98.2 percent of original size 215 [2021-02-21 21:38:32,003 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-21 21:38:32,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:32,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:38:32,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:32,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:38:32,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:32,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:32,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:38:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:32,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:32,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:32,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:38:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:38:32,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:32,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:38:32,138 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 21:38:32,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065726658] [2021-02-21 21:38:32,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:38:32,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 21:38:32,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128418213] [2021-02-21 21:38:32,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 21:38:32,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:38:32,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 21:38:32,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:38:32,141 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 19 states. [2021-02-21 21:38:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:38:33,801 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2021-02-21 21:38:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-21 21:38:33,802 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2021-02-21 21:38:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:38:33,803 INFO L225 Difference]: With dead ends: 119 [2021-02-21 21:38:33,803 INFO L226 Difference]: Without dead ends: 117 [2021-02-21 21:38:33,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-02-21 21:38:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-21 21:38:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2021-02-21 21:38:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-02-21 21:38:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-02-21 21:38:33,857 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 52 [2021-02-21 21:38:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:38:33,857 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-02-21 21:38:33,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 21:38:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-02-21 21:38:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-21 21:38:33,858 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:38:33,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:38:33,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:38:33,859 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:38:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:38:33,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2035321656, now seen corresponding path program 2 times [2021-02-21 21:38:33,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:38:33,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660826852] [2021-02-21 21:38:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:38:43,184 WARN L202 SmtUtils]: Spent 9.31 s on a formula simplification. DAG size of input: 540 DAG size of output: 274 [2021-02-21 21:39:01,440 WARN L202 SmtUtils]: Spent 15.98 s on a formula simplification. DAG size of input: 608 DAG size of output: 278 [2021-02-21 21:39:01,444 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:39:01,445 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:39:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:01,496 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:39:01,498 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:39:01,524 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:39:01,525 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:39:01,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:01,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:39:01,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:01,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:39:01,597 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:39:01,598 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-21 21:39:01,706 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-21 21:39:01,707 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-21 21:39:01,746 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:39:01,747 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-21 21:39:01,826 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-21 21:39:01,827 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-21 21:39:01,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:01,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:01,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:39:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:01,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:01,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:01,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:01,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:39:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:39:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:01,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:01,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:01,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-21 21:39:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:01,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:01,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:01,961 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 21:39:01,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660826852] [2021-02-21 21:39:01,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:39:01,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:39:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58910301] [2021-02-21 21:39:01,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:39:01,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:39:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:39:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:39:01,964 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 10 states. [2021-02-21 21:39:02,252 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-21 21:39:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:39:03,223 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2021-02-21 21:39:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:39:03,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2021-02-21 21:39:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:39:03,226 INFO L225 Difference]: With dead ends: 123 [2021-02-21 21:39:03,226 INFO L226 Difference]: Without dead ends: 97 [2021-02-21 21:39:03,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:39:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-21 21:39:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2021-02-21 21:39:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-21 21:39:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-02-21 21:39:03,264 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 61 [2021-02-21 21:39:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:39:03,265 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-02-21 21:39:03,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:39:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-02-21 21:39:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-21 21:39:03,266 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:39:03,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:39:03,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 21:39:03,266 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:39:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:39:03,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1202559720, now seen corresponding path program 1 times [2021-02-21 21:39:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:39:03,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024206671] [2021-02-21 21:39:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:39:09,151 WARN L202 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 540 DAG size of output: 242 [2021-02-21 21:39:35,740 WARN L202 SmtUtils]: Spent 22.37 s on a formula simplification. DAG size of input: 608 DAG size of output: 310 [2021-02-21 21:39:35,746 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:39:35,748 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:39:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:35,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:35,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:35,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:35,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:39:35,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:35,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:39:35,804 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:39:35,805 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:39:35,851 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:39:35,852 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:39:35,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:35,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:35,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:39:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:35,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:35,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:35,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 21:39:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:35,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:35,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:35,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-21 21:39:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:39:35,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:39:35,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:39:35,932 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 21:39:35,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024206671] [2021-02-21 21:39:35,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:39:35,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:39:35,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951459760] [2021-02-21 21:39:35,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:39:35,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:39:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:39:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:39:35,934 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 6 states. [2021-02-21 21:39:36,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:39:36,730 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2021-02-21 21:39:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:39:36,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2021-02-21 21:39:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:39:36,734 INFO L225 Difference]: With dead ends: 122 [2021-02-21 21:39:36,734 INFO L226 Difference]: Without dead ends: 96 [2021-02-21 21:39:36,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:39:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-21 21:39:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-02-21 21:39:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-21 21:39:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-02-21 21:39:36,766 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 62 [2021-02-21 21:39:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:39:36,766 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-02-21 21:39:36,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:39:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-02-21 21:39:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-21 21:39:36,767 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:39:36,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:39:36,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 21:39:36,768 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:39:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:39:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1330557822, now seen corresponding path program 1 times [2021-02-21 21:39:36,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:39:36,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196632819] [2021-02-21 21:39:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:39:44,077 WARN L202 SmtUtils]: Spent 7.28 s on a formula simplification. DAG size of input: 540 DAG size of output: 232