/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/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:03:28,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:03:28,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:03:28,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:03:28,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:03:28,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:03:28,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:03:28,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:03:28,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:03:28,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:03:28,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:03:28,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:03:28,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:03:28,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:03:28,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:03:28,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:03:28,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:03:28,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:03:28,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:03:28,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:03:28,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:03:28,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:03:28,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:03:28,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:03:28,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 19:03:28,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 19:03:28,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 19:03:28,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 19:03:28,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 19:03:28,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 19:03:28,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 19:03:28,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 19:03:28,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 19:03:28,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 19:03:28,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 19:03:28,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 19:03:28,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 19:03:28,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 19:03:28,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:03:28,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:03:28,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:03:28,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:03:28,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:03:28,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:03:28,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:03:28,749 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:03:28,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:03:28,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:03:28,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:03:28,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:03:28,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:03:28,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:03:28,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:03:28,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:03:28,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:03:28,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:03:28,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:03:28,752 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:03:28,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:03:28,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:03:28,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:03:28,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:03:28,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:03:28,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:03:28,754 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:03:29,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:03:29,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:03:29,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:03:29,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:03:29,254 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:03:29,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2021-02-23 19:03:29,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e2f4d8bc/5c7814de3b0146948686dce7731e85a9/FLAG1d24a876b [2021-02-23 19:03:29,927 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:03:29,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2021-02-23 19:03:29,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e2f4d8bc/5c7814de3b0146948686dce7731e85a9/FLAG1d24a876b [2021-02-23 19:03:30,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e2f4d8bc/5c7814de3b0146948686dce7731e85a9 [2021-02-23 19:03:30,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:03:30,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:03:30,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:30,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:03:30,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:03:30,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21dd3c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30, skipping insertion in model container [2021-02-23 19:03:30,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:03:30,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:03:30,518 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/sumt5.c[403,416] [2021-02-23 19:03:30,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:30,546 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:03:30,571 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/sumt5.c[403,416] [2021-02-23 19:03:30,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:30,614 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:03:30,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30 WrapperNode [2021-02-23 19:03:30,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:30,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:03:30,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:03:30,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:03:30,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:03:30,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:03:30,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:03:30,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:03:30,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (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 [2021-02-23 19:03:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:03:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:03:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:03:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:03:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:03:30,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:03:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:03:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:03:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:03:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:03:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:03:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:03:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:03:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:03:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:03:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:03:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:03:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:03:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:03:30,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:03:31,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:03:31,350 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:03:31,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:31 BoogieIcfgContainer [2021-02-23 19:03:31,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:03:31,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:03:31,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:03:31,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:03:31,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:03:30" (1/3) ... [2021-02-23 19:03:31,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0cab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:31, skipping insertion in model container [2021-02-23 19:03:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (2/3) ... [2021-02-23 19:03:31,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0cab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:31, skipping insertion in model container [2021-02-23 19:03:31,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:31" (3/3) ... [2021-02-23 19:03:31,414 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2021-02-23 19:03:31,441 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:03:31,446 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:03:31,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:03:31,510 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:03:31,510 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:03:31,510 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:03:31,510 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:03:31,510 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:03:31,511 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:03:31,511 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:03:31,511 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:03:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2021-02-23 19:03:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 19:03:31,553 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:31,554 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] [2021-02-23 19:03:31,554 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1150784678, now seen corresponding path program 1 times [2021-02-23 19:03:31,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:31,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426450740] [2021-02-23 19:03:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:31,673 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:32,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:32,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:32,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:32,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:32,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:32,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:32,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:32,264 WARN L141 QuantifierPusher]: treesize reduction 26, result has 71.1 percent of original size [2021-02-23 19:03:32,267 WARN L147 QuantifierPusher]: treesize reduction 26, result has 71.1 percent of original size 64 [2021-02-23 19:03:32,298 WARN L141 QuantifierPusher]: treesize reduction 27, result has 80.9 percent of original size [2021-02-23 19:03:32,303 WARN L147 QuantifierPusher]: treesize reduction 27, result has 80.9 percent of original size 114 [2021-02-23 19:03:32,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:32,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:32,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:32,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:32,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:32,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426450740] [2021-02-23 19:03:32,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:32,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 19:03:32,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412464020] [2021-02-23 19:03:32,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 19:03:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 19:03:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:03:32,444 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 11 states. [2021-02-23 19:03:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:33,419 INFO L93 Difference]: Finished difference Result 129 states and 172 transitions. [2021-02-23 19:03:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 19:03:33,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2021-02-23 19:03:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:33,444 INFO L225 Difference]: With dead ends: 129 [2021-02-23 19:03:33,445 INFO L226 Difference]: Without dead ends: 80 [2021-02-23 19:03:33,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:03:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-23 19:03:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 42. [2021-02-23 19:03:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-23 19:03:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-02-23 19:03:33,508 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2021-02-23 19:03:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:33,508 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-02-23 19:03:33,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 19:03:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-02-23 19:03:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-23 19:03:33,510 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:33,511 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] [2021-02-23 19:03:33,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:03:33,511 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:33,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1302396788, now seen corresponding path program 1 times [2021-02-23 19:03:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:33,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57128422] [2021-02-23 19:03:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:35,574 WARN L202 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2021-02-23 19:03:35,588 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:35,591 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:35,753 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-23 19:03:35,758 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-23 19:03:35,779 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-23 19:03:35,786 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-23 19:03:35,811 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-23 19:03:35,815 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-23 19:03:35,851 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-23 19:03:35,853 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-23 19:03:35,884 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-23 19:03:35,889 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-23 19:03:35,944 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-23 19:03:35,947 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-23 19:03:35,990 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-23 19:03:35,994 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-23 19:03:36,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:36,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:03:36,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 19:03:36,157 WARN L141 QuantifierPusher]: treesize reduction 28, result has 85.1 percent of original size [2021-02-23 19:03:36,172 WARN L147 QuantifierPusher]: treesize reduction 28, result has 85.1 percent of original size 160 [2021-02-23 19:03:36,302 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-02-23 19:03:36,313 WARN L141 QuantifierPusher]: treesize reduction 28, result has 83.9 percent of original size [2021-02-23 19:03:36,316 WARN L147 QuantifierPusher]: treesize reduction 28, result has 83.9 percent of original size 146 [2021-02-23 19:03:36,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:36,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:36,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:36,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:36,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:36,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:36,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57128422] [2021-02-23 19:03:36,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:36,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 19:03:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137522220] [2021-02-23 19:03:36,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 19:03:36,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:36,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 19:03:36,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-23 19:03:36,545 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 18 states. [2021-02-23 19:03:37,058 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-23 19:03:37,305 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-23 19:03:37,617 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-23 19:03:37,792 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-23 19:03:38,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:38,230 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-02-23 19:03:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 19:03:38,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2021-02-23 19:03:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:38,232 INFO L225 Difference]: With dead ends: 95 [2021-02-23 19:03:38,233 INFO L226 Difference]: Without dead ends: 90 [2021-02-23 19:03:38,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-02-23 19:03:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-23 19:03:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2021-02-23 19:03:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 19:03:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-02-23 19:03:38,258 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2021-02-23 19:03:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:38,259 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-02-23 19:03:38,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 19:03:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-02-23 19:03:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 19:03:38,260 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:38,260 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] [2021-02-23 19:03:38,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:03:38,261 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash -719189646, now seen corresponding path program 2 times [2021-02-23 19:03:38,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:38,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108081880] [2021-02-23 19:03:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:39,595 WARN L202 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2021-02-23 19:03:41,774 WARN L202 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2021-02-23 19:03:41,777 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:41,778 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:41,878 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:03:41,879 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:03:41,896 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 19:03:41,897 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 19:03:41,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:41,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:41,931 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:03:41,932 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 97 [2021-02-23 19:03:41,979 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:03:41,980 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 95 [2021-02-23 19:03:41,998 WARN L141 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size [2021-02-23 19:03:41,999 WARN L147 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size 1 [2021-02-23 19:03:42,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:42,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:42,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:42,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:42,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:42,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:42,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:42,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108081880] [2021-02-23 19:03:42,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:42,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 19:03:42,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457071822] [2021-02-23 19:03:42,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 19:03:42,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 19:03:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-23 19:03:42,075 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2021-02-23 19:03:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:42,553 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-02-23 19:03:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:03:42,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-02-23 19:03:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:42,555 INFO L225 Difference]: With dead ends: 70 [2021-02-23 19:03:42,556 INFO L226 Difference]: Without dead ends: 54 [2021-02-23 19:03:42,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-23 19:03:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-23 19:03:42,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-02-23 19:03:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-23 19:03:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-02-23 19:03:42,577 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-02-23 19:03:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:42,578 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-02-23 19:03:42,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 19:03:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-02-23 19:03:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-23 19:03:42,579 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:42,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:42,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:03:42,580 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:42,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1043250282, now seen corresponding path program 1 times [2021-02-23 19:03:42,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:42,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872548079] [2021-02-23 19:03:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:43,969 WARN L202 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2021-02-23 19:03:44,819 WARN L202 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2021-02-23 19:03:47,626 WARN L202 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2021-02-23 19:03:47,628 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:47,629 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:47,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:47,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:47,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:47,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:47,705 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:03:47,707 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:03:47,732 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:03:47,733 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:03:47,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:47,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:47,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:47,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:47,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:47,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872548079] [2021-02-23 19:03:47,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:47,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:47,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986376083] [2021-02-23 19:03:47,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:47,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:47,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:47,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:47,782 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2021-02-23 19:03:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:47,993 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-02-23 19:03:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:47,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-02-23 19:03:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:47,995 INFO L225 Difference]: With dead ends: 69 [2021-02-23 19:03:47,995 INFO L226 Difference]: Without dead ends: 53 [2021-02-23 19:03:47,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-23 19:03:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-02-23 19:03:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 19:03:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-02-23 19:03:48,015 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-02-23 19:03:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:48,016 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-02-23 19:03:48,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-02-23 19:03:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 19:03:48,017 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:48,017 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 19:03:48,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:03:48,018 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash 874367992, now seen corresponding path program 1 times [2021-02-23 19:03:48,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:48,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903204828] [2021-02-23 19:03:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:04,183 WARN L202 SmtUtils]: Spent 16.11 s on a formula simplification. DAG size of input: 8993 DAG size of output: 140 [2021-02-23 19:04:05,227 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2021-02-23 19:04:05,928 WARN L202 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-23 19:04:05,930 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:05,932 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:06,012 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-23 19:04:06,013 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-23 19:04:06,030 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-23 19:04:06,031 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-23 19:04:06,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:06,059 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-23 19:04:06,060 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 110 [2021-02-23 19:04:06,123 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.8 percent of original size [2021-02-23 19:04:06,126 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.8 percent of original size 109 [2021-02-23 19:04:06,191 WARN L141 QuantifierPusher]: treesize reduction 12, result has 67.6 percent of original size [2021-02-23 19:04:06,192 WARN L147 QuantifierPusher]: treesize reduction 12, result has 67.6 percent of original size 25 [2021-02-23 19:04:06,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 19:04:06,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:06,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:06,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:06,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:06,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903204828] [2021-02-23 19:04:06,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:06,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 19:04:06,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803258317] [2021-02-23 19:04:06,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 19:04:06,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:06,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 19:04:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:04:06,357 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2021-02-23 19:04:06,889 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-23 19:04:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:09,334 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-02-23 19:04:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:04:09,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2021-02-23 19:04:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:09,336 INFO L225 Difference]: With dead ends: 68 [2021-02-23 19:04:09,336 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 19:04:09,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-02-23 19:04:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 19:04:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-02-23 19:04:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-23 19:04:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-02-23 19:04:09,365 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2021-02-23 19:04:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:09,366 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-02-23 19:04:09,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 19:04:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-02-23 19:04:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 19:04:09,367 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:09,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:09,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:04:09,368 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 964039088, now seen corresponding path program 1 times [2021-02-23 19:04:09,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:09,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417534747] [2021-02-23 19:04:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:11,393 WARN L202 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 179 DAG size of output: 123 [2021-02-23 19:04:12,706 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-23 19:08:38,112 WARN L202 SmtUtils]: Spent 4.34 m on a formula simplification. DAG size of input: 699537 DAG size of output: 113 [2021-02-23 19:08:38,115 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:08:38,117 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:08:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:38,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:38,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:38,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:38,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:08:38,228 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:08:38,230 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:08:38,253 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:08:38,254 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:08:38,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:38,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:38,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:08:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:38,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:38,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:08:38,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417534747] [2021-02-23 19:08:38,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:08:38,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:08:38,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235833875] [2021-02-23 19:08:38,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:08:38,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:08:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:08:38,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:08:38,315 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2021-02-23 19:08:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:08:38,806 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-02-23 19:08:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:08:38,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-02-23 19:08:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:08:38,809 INFO L225 Difference]: With dead ends: 67 [2021-02-23 19:08:38,810 INFO L226 Difference]: Without dead ends: 51 [2021-02-23 19:08:38,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:08:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-23 19:08:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-02-23 19:08:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-23 19:08:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-02-23 19:08:38,861 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2021-02-23 19:08:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:08:38,862 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-02-23 19:08:38,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:08:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-02-23 19:08:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 19:08:38,866 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:08:38,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:08:38,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:08:38,868 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:08:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:08:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash 265046544, now seen corresponding path program 1 times [2021-02-23 19:08:38,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:08:38,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378786977] [2021-02-23 19:08:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:08:40,847 WARN L202 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2021-02-23 19:08:41,648 WARN L202 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-23 19:08:43,118 WARN L202 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2021-02-23 19:08:43,121 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:08:43,124 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:08:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:43,231 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-23 19:08:43,232 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-23 19:08:43,255 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-23 19:08:43,257 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-23 19:08:43,286 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-23 19:08:43,288 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-23 19:08:43,324 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-23 19:08:43,326 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-23 19:08:43,372 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-23 19:08:43,373 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-23 19:08:43,428 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-23 19:08:43,431 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-23 19:08:43,491 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-23 19:08:43,493 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-23 19:08:43,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:43,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:08:43,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:43,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 19:08:43,654 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.0 percent of original size [2021-02-23 19:08:43,656 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.0 percent of original size 48 [2021-02-23 19:08:43,738 WARN L141 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-02-23 19:08:43,740 WARN L147 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size 52 [2021-02-23 19:08:43,818 WARN L141 QuantifierPusher]: treesize reduction 7, result has 89.4 percent of original size [2021-02-23 19:08:43,819 WARN L147 QuantifierPusher]: treesize reduction 7, result has 89.4 percent of original size 59 [2021-02-23 19:08:43,905 WARN L141 QuantifierPusher]: treesize reduction 28, result has 85.3 percent of original size [2021-02-23 19:08:43,907 WARN L147 QuantifierPusher]: treesize reduction 28, result has 85.3 percent of original size 162 [2021-02-23 19:08:44,077 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-02-23 19:08:44,092 WARN L141 QuantifierPusher]: treesize reduction 28, result has 84.4 percent of original size [2021-02-23 19:08:44,095 WARN L147 QuantifierPusher]: treesize reduction 28, result has 84.4 percent of original size 151 [2021-02-23 19:08:44,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:44,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:08:44,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:44,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:08:44,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:44,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:44,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:08:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:44,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:44,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:44,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:44,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:08:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:08:44,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378786977] [2021-02-23 19:08:44,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:08:44,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-23 19:08:44,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769161425] [2021-02-23 19:08:44,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 19:08:44,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:08:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 19:08:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:08:44,384 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 20 states. [2021-02-23 19:08:44,844 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-02-23 19:08:45,003 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-23 19:08:45,171 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-23 19:08:45,337 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-23 19:08:45,553 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-23 19:08:45,752 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-23 19:08:45,945 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-23 19:08:46,209 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-23 19:08:46,422 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-23 19:08:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:08:46,840 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-02-23 19:08:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 19:08:46,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2021-02-23 19:08:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:08:46,842 INFO L225 Difference]: With dead ends: 78 [2021-02-23 19:08:46,842 INFO L226 Difference]: Without dead ends: 73 [2021-02-23 19:08:46,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 19:08:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-23 19:08:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-02-23 19:08:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 19:08:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-02-23 19:08:46,866 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2021-02-23 19:08:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:08:46,867 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-02-23 19:08:46,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 19:08:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-02-23 19:08:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 19:08:46,868 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:08:46,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:08:46,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:08:46,869 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:08:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:08:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1073286922, now seen corresponding path program 2 times [2021-02-23 19:08:46,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:08:46,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085473820] [2021-02-23 19:08:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:08:49,435 WARN L202 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 184 DAG size of output: 149 [2021-02-23 19:08:51,461 WARN L202 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2021-02-23 19:08:52,914 WARN L202 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 901 DAG size of output: 89