/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/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:03:33,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:03:33,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:03:33,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:03:33,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:03:33,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:03:33,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:03:34,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:03:34,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:03:34,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:03:34,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:03:34,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:03:34,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:03:34,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:03:34,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:03:34,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:03:34,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:03:34,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:03:34,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:03:34,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:03:34,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:03:34,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:03:34,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:03:34,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:03:34,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 19:03:34,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 19:03:34,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 19:03:34,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 19:03:34,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 19:03:34,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-02-23 19:03:34,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:03:34,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:03:34,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:03:34,089 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 19:03:34,102 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:03:34,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:03:34,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:03:34,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:03:34,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:03:34,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:03:34,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:03:34,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:03:34,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:03:34,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:03:34,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:03:34,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:03:34,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:03:34,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:03:34,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:03:34,107 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:03:34,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:03:34,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:03:34,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:03:34,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:03:34,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:03:34,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:03:34,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:03:34,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:03:34,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:03:34,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:03:34,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:03:34,542 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:03:34,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-02-23 19:03:34,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ab7ac3/fa54f93dc6094ff68ed9b47006305240/FLAGa7ac4d673 [2021-02-23 19:03:35,236 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:03:35,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-02-23 19:03:35,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ab7ac3/fa54f93dc6094ff68ed9b47006305240/FLAGa7ac4d673 [2021-02-23 19:03:35,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ab7ac3/fa54f93dc6094ff68ed9b47006305240 [2021-02-23 19:03:35,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:03:35,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:03:35,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:35,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:03:35,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:03:35,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749e6c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35, skipping insertion in model container [2021-02-23 19:03:35,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:03:35,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:03:35,823 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/sumt8.c[403,416] [2021-02-23 19:03:35,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:35,854 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:03:35,869 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/sumt8.c[403,416] [2021-02-23 19:03:35,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:35,898 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:03:35,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35 WrapperNode [2021-02-23 19:03:35,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:35,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:03:35,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:03:35,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:03:35,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (1/1) ... [2021-02-23 19:03:35,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:03:35,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:03:35,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:03:35,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:03:35,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (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 19:03:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:03:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:03:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:03:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:03:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:03:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:03:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:03:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:03:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:03:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:03:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:03:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:03:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:03:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:03:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:03:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:03:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:03:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:03:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:03:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:03:36,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:03:36,575 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:03:36,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:36 BoogieIcfgContainer [2021-02-23 19:03:36,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:03:36,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:03:36,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:03:36,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:03:36,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:03:35" (1/3) ... [2021-02-23 19:03:36,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d246351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:36, skipping insertion in model container [2021-02-23 19:03:36,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:35" (2/3) ... [2021-02-23 19:03:36,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d246351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:36, skipping insertion in model container [2021-02-23 19:03:36,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:36" (3/3) ... [2021-02-23 19:03:36,593 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2021-02-23 19:03:36,601 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:03:36,607 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:03:36,628 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:03:36,662 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:03:36,663 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:03:36,663 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:03:36,663 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:03:36,663 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:03:36,663 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:03:36,664 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:03:36,664 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:03:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2021-02-23 19:03:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 19:03:36,708 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:36,709 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] [2021-02-23 19:03:36,710 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash 948591750, now seen corresponding path program 1 times [2021-02-23 19:03:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:36,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799044531] [2021-02-23 19:03:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:36,829 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:37,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:37,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:37,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:37,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:37,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:37,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:37,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:37,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:03:37,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:03:37,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:03:37,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:37,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:03:37,861 WARN L141 QuantifierPusher]: treesize reduction 34, result has 83.1 percent of original size [2021-02-23 19:03:37,869 WARN L147 QuantifierPusher]: treesize reduction 34, result has 83.1 percent of original size 167 [2021-02-23 19:03:38,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:38,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:38,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:38,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:38,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:38,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:38,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:38,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:38,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:38,154 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 19:03:38,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799044531] [2021-02-23 19:03:38,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:38,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 19:03:38,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482499158] [2021-02-23 19:03:38,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 19:03:38,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:38,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 19:03:38,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-02-23 19:03:38,205 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 16 states. [2021-02-23 19:03:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:39,542 INFO L93 Difference]: Finished difference Result 181 states and 248 transitions. [2021-02-23 19:03:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 19:03:39,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2021-02-23 19:03:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:39,556 INFO L225 Difference]: With dead ends: 181 [2021-02-23 19:03:39,556 INFO L226 Difference]: Without dead ends: 130 [2021-02-23 19:03:39,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-02-23 19:03:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-23 19:03:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 60. [2021-02-23 19:03:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 19:03:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-02-23 19:03:39,633 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 35 [2021-02-23 19:03:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:39,633 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-02-23 19:03:39,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 19:03:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-02-23 19:03:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 19:03:39,636 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:39,636 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] [2021-02-23 19:03:39,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:03:39,637 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1775592559, now seen corresponding path program 1 times [2021-02-23 19:03:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:39,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133768236] [2021-02-23 19:03:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:44,373 WARN L202 SmtUtils]: Spent 4.70 s on a formula simplification. DAG size of input: 449 DAG size of output: 200 [2021-02-23 19:03:44,399 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:44,401 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:44,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:44,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:44,489 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:03:44,490 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:03:44,506 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:03:44,508 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:03:44,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:44,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:44,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:44,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:03:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:44,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:44,581 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 19:03:44,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133768236] [2021-02-23 19:03:44,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:44,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858279867] [2021-02-23 19:03:44,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:44,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:44,586 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 5 states. [2021-02-23 19:03:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:44,853 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2021-02-23 19:03:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:44,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-02-23 19:03:44,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:44,857 INFO L225 Difference]: With dead ends: 100 [2021-02-23 19:03:44,859 INFO L226 Difference]: Without dead ends: 76 [2021-02-23 19:03:44,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-23 19:03:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-02-23 19:03:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 19:03:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-02-23 19:03:44,918 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2021-02-23 19:03:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:44,919 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-02-23 19:03:44,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-02-23 19:03:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 19:03:44,924 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:44,924 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] [2021-02-23 19:03:44,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:03:44,925 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash -746409004, now seen corresponding path program 1 times [2021-02-23 19:03:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:44,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878012628] [2021-02-23 19:03:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:49,186 WARN L202 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 529 DAG size of output: 255 [2021-02-23 19:03:49,192 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:49,194 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:49,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:49,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:49,279 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-23 19:03:49,280 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-23 19:03:49,326 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:03:49,329 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-23 19:03:49,344 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-23 19:03:49,346 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-23 19:03:49,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:49,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:49,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:03:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:49,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:49,394 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 19:03:49,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878012628] [2021-02-23 19:03:49,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:49,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:49,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398608228] [2021-02-23 19:03:49,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:49,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:49,397 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2021-02-23 19:03:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:49,733 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-02-23 19:03:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:49,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-02-23 19:03:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:49,735 INFO L225 Difference]: With dead ends: 99 [2021-02-23 19:03:49,735 INFO L226 Difference]: Without dead ends: 75 [2021-02-23 19:03:49,736 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 [2021-02-23 19:03:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-23 19:03:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-02-23 19:03:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 19:03:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-02-23 19:03:49,762 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 45 [2021-02-23 19:03:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:49,763 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-02-23 19:03:49,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-02-23 19:03:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 19:03:49,764 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:49,764 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] [2021-02-23 19:03:49,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:03:49,765 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1447271223, now seen corresponding path program 1 times [2021-02-23 19:03:49,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:49,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299135106] [2021-02-23 19:03:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:56,738 WARN L202 SmtUtils]: Spent 6.96 s on a formula simplification. DAG size of input: 453 DAG size of output: 280 [2021-02-23 19:03:56,744 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:56,745 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:56,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:56,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:56,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:56,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:56,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:56,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-23 19:03:56,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:56,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:56,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:56,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:56,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:56,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:03:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:56,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:56,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:56,877 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 19:03:56,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299135106] [2021-02-23 19:03:56,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:56,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:56,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993797016] [2021-02-23 19:03:56,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:56,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:56,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:56,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:56,880 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 5 states. [2021-02-23 19:03:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:57,139 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2021-02-23 19:03:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:57,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-02-23 19:03:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:57,141 INFO L225 Difference]: With dead ends: 89 [2021-02-23 19:03:57,142 INFO L226 Difference]: Without dead ends: 65 [2021-02-23 19:03:57,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-23 19:03:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-02-23 19:03:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-23 19:03:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-02-23 19:03:57,167 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 46 [2021-02-23 19:03:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:57,168 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-02-23 19:03:57,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-02-23 19:03:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 19:03:57,169 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:57,169 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] [2021-02-23 19:03:57,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:03:57,170 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1527388626, now seen corresponding path program 1 times [2021-02-23 19:03:57,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:57,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744899747] [2021-02-23 19:03:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:00,154 WARN L202 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 529 DAG size of output: 191 [2021-02-23 19:04:00,160 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:00,162 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:00,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:00,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:00,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:00,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:00,236 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-23 19:04:00,237 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 87 [2021-02-23 19:04:00,264 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:04:00,265 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 95 [2021-02-23 19:04:00,277 WARN L141 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size [2021-02-23 19:04:00,277 WARN L147 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size 1 [2021-02-23 19:04:00,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:00,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:00,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:00,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:00,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:00,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:04:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:00,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:00,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:00,322 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 19:04:00,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744899747] [2021-02-23 19:04:00,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:00,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:04:00,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149173177] [2021-02-23 19:04:00,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:04:00,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:04:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:04:00,326 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 5 states. [2021-02-23 19:04:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:00,617 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-02-23 19:04:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:04:00,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2021-02-23 19:04:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:00,619 INFO L225 Difference]: With dead ends: 97 [2021-02-23 19:04:00,619 INFO L226 Difference]: Without dead ends: 73 [2021-02-23 19:04:00,620 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 [2021-02-23 19:04:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-23 19:04:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2021-02-23 19:04:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-23 19:04:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-02-23 19:04:00,647 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 47 [2021-02-23 19:04:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:00,647 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-02-23 19:04:00,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:04:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-02-23 19:04:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 19:04:00,648 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:00,649 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] [2021-02-23 19:04:00,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:04:00,649 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash 455714083, now seen corresponding path program 1 times [2021-02-23 19:04:00,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:00,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361102334] [2021-02-23 19:04:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:06,143 WARN L202 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 438 DAG size of output: 218 [2021-02-23 19:04:06,148 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:06,150 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:06,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:06,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:06,197 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:04:06,198 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:04:06,213 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:06,213 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:06,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:06,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:06,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:06,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:04:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:06,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:06,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:06,256 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 19:04:06,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361102334] [2021-02-23 19:04:06,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:06,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:04:06,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928387142] [2021-02-23 19:04:06,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:04:06,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:04:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:04:06,259 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2021-02-23 19:04:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:06,484 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2021-02-23 19:04:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:04:06,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2021-02-23 19:04:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:06,486 INFO L225 Difference]: With dead ends: 96 [2021-02-23 19:04:06,486 INFO L226 Difference]: Without dead ends: 72 [2021-02-23 19:04:06,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:04:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-23 19:04:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-02-23 19:04:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-23 19:04:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-02-23 19:04:06,512 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 48 [2021-02-23 19:04:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:06,513 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-02-23 19:04:06,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:04:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-02-23 19:04:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 19:04:06,514 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:06,514 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] [2021-02-23 19:04:06,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:04:06,514 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1974130824, now seen corresponding path program 1 times [2021-02-23 19:04:06,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:06,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327374846] [2021-02-23 19:04:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:11,858 WARN L202 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 450 DAG size of output: 200 [2021-02-23 19:04:11,863 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:11,865 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:11,944 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:04:11,945 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:04:11,960 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 19:04:11,962 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 19:04:11,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:11,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:11,993 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-23 19:04:11,994 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 110 [2021-02-23 19:04:12,040 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size [2021-02-23 19:04:12,042 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size 101 [2021-02-23 19:04:12,060 WARN L141 QuantifierPusher]: treesize reduction 6, result has 93.9 percent of original size [2021-02-23 19:04:12,062 WARN L147 QuantifierPusher]: treesize reduction 6, result has 93.9 percent of original size 92 [2021-02-23 19:04:12,100 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:12,100 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:12,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:12,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:12,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:12,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:12,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:12,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:12,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:12,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:04:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:12,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:12,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:12,183 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 19:04:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327374846] [2021-02-23 19:04:12,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:12,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:04:12,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358073075] [2021-02-23 19:04:12,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:04:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:12,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:04:12,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:04:12,185 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 9 states. [2021-02-23 19:04:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:12,776 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-02-23 19:04:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:04:12,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2021-02-23 19:04:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:12,778 INFO L225 Difference]: With dead ends: 95 [2021-02-23 19:04:12,778 INFO L226 Difference]: Without dead ends: 71 [2021-02-23 19:04:12,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-23 19:04:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-23 19:04:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-02-23 19:04:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-23 19:04:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-02-23 19:04:12,809 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 49 [2021-02-23 19:04:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:12,809 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-02-23 19:04:12,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:04:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-02-23 19:04:12,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-23 19:04:12,810 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:12,810 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] [2021-02-23 19:04:12,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:04:12,811 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1972184445, now seen corresponding path program 1 times [2021-02-23 19:04:12,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:12,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494526707] [2021-02-23 19:04:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:17,324 WARN L202 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 529 DAG size of output: 255 [2021-02-23 19:04:17,327 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:17,328 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:17,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:17,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:17,372 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:04:17,373 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:04:17,389 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:17,389 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:17,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:17,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:17,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:17,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:04:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:17,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:17,437 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 19:04:17,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494526707] [2021-02-23 19:04:17,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:17,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:04:17,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9149869] [2021-02-23 19:04:17,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:04:17,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:04:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:04:17,440 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 5 states. [2021-02-23 19:04:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:17,673 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-02-23 19:04:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:04:17,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2021-02-23 19:04:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:17,675 INFO L225 Difference]: With dead ends: 94 [2021-02-23 19:04:17,675 INFO L226 Difference]: Without dead ends: 70 [2021-02-23 19:04:17,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:04:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-23 19:04:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-02-23 19:04:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-23 19:04:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2021-02-23 19:04:17,703 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 50 [2021-02-23 19:04:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:17,703 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2021-02-23 19:04:17,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:04:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2021-02-23 19:04:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-23 19:04:17,705 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:17,705 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] [2021-02-23 19:04:17,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 19:04:17,705 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash 425615645, now seen corresponding path program 1 times [2021-02-23 19:04:17,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:17,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557375979] [2021-02-23 19:04:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:24,832 WARN L202 SmtUtils]: Spent 7.11 s on a formula simplification. DAG size of input: 464 DAG size of output: 252 [2021-02-23 19:04:24,845 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:24,847 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:24,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:24,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:24,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:24,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:24,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:24,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:25,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:04:25,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:25,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:04:25,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:04:25,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:04:25,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:04:25,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:04:25,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:04:25,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:04:25,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 19:04:25,233 WARN L141 QuantifierPusher]: treesize reduction 34, result has 83.5 percent of original size [2021-02-23 19:04:25,236 WARN L147 QuantifierPusher]: treesize reduction 34, result has 83.5 percent of original size 172 [2021-02-23 19:04:25,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:25,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:25,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:25,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:25,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:25,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-23 19:04:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:25,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:25,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:25,440 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 19:04:25,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557375979] [2021-02-23 19:04:25,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:25,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 19:04:25,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123521598] [2021-02-23 19:04:25,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 19:04:25,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 19:04:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-02-23 19:04:25,442 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 18 states. [2021-02-23 19:04:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:26,637 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2021-02-23 19:04:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 19:04:26,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2021-02-23 19:04:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:26,641 INFO L225 Difference]: With dead ends: 111 [2021-02-23 19:04:26,641 INFO L226 Difference]: Without dead ends: 109 [2021-02-23 19:04:26,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 19:04:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-23 19:04:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2021-02-23 19:04:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-23 19:04:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-02-23 19:04:26,682 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 50 [2021-02-23 19:04:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:26,683 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-02-23 19:04:26,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 19:04:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-02-23 19:04:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-23 19:04:26,684 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:26,684 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] [2021-02-23 19:04:26,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 19:04:26,684 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1956092344, now seen corresponding path program 2 times [2021-02-23 19:04:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:26,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592244072] [2021-02-23 19:04:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY