/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-b7b32d2 [2021-02-21 21:32:57,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:32:57,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:32:57,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:32:57,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:32:57,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:32:57,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:32:57,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:32:57,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:32:57,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:32:57,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:32:57,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:32:57,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:32:57,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:32:57,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:32:57,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:32:57,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:32:57,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:32:57,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:32:57,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:32:57,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:32:57,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:32:57,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:32:57,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:32:57,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:32:57,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:32:57,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:32:57,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:32:57,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:32:57,622 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:32:57,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:32:57,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:32:57,627 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:32:57,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:32:57,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:32:57,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:32:57,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:32:57,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:32:57,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:32:57,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:32:57,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:32:57,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:32:57,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:32:57,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:32:57,631 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:32:57,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:32:57,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:32:57,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:32:57,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:32:57,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:32:57,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:32:57,633 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:32:58,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:32:58,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:32:58,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:32:58,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:32:58,106 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:32:58,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2021-02-21 21:32:58,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c541c1982/bef464f05a9c4b2288337a1b474a31e5/FLAG682360fcb [2021-02-21 21:32:58,778 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:32:58,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2021-02-21 21:32:58,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c541c1982/bef464f05a9c4b2288337a1b474a31e5/FLAG682360fcb [2021-02-21 21:32:59,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c541c1982/bef464f05a9c4b2288337a1b474a31e5 [2021-02-21 21:32:59,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:32:59,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:32:59,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:59,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:32:59,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:32:59,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3c87e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59, skipping insertion in model container [2021-02-21 21:32:59,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:32:59,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:32:59,345 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] [2021-02-21 21:32:59,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:59,373 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:32:59,386 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] [2021-02-21 21:32:59,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:59,410 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:32:59,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59 WrapperNode [2021-02-21 21:32:59,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:59,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:32:59,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:32:59,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:32:59,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... [2021-02-21 21:32:59,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:32:59,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:32:59,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:32:59,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:32:59,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:32:59,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:32:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:32:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:32:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:32:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:32:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:32:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:32:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:32:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:32:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:32:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:32:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:32:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:32:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:32:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:32:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:32:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:32:59,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:32:59,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:32:59,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:32:59,860 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:32:59,860 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:32:59,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:59 BoogieIcfgContainer [2021-02-21 21:32:59,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:32:59,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:32:59,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:32:59,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:32:59,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:32:59" (1/3) ... [2021-02-21 21:32:59,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ded286f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:59, skipping insertion in model container [2021-02-21 21:32:59,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:59" (2/3) ... [2021-02-21 21:32:59,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ded286f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:59, skipping insertion in model container [2021-02-21 21:32:59,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:59" (3/3) ... [2021-02-21 21:32:59,889 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2021-02-21 21:32:59,904 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:32:59,920 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:32:59,951 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:32:59,984 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:32:59,984 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:32:59,984 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:32:59,984 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:32:59,985 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:32:59,985 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:32:59,985 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:32:59,985 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:33:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2021-02-21 21:33:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 21:33:00,016 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:00,017 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] [2021-02-21 21:33:00,018 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1150784678, now seen corresponding path program 1 times [2021-02-21 21:33:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:00,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284581845] [2021-02-21 21:33:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:00,179 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:00,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:00,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:00,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:00,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:00,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:00,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:00,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:33:00,662 WARN L141 QuantifierPusher]: treesize reduction 26, result has 71.1 percent of original size [2021-02-21 21:33:00,672 WARN L147 QuantifierPusher]: treesize reduction 26, result has 71.1 percent of original size 64 [2021-02-21 21:33:00,717 WARN L141 QuantifierPusher]: treesize reduction 27, result has 80.9 percent of original size [2021-02-21 21:33:00,725 WARN L147 QuantifierPusher]: treesize reduction 27, result has 80.9 percent of original size 114 [2021-02-21 21:33:00,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:00,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:00,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:00,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:00,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:00,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:00,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284581845] [2021-02-21 21:33:00,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:00,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 21:33:00,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748633110] [2021-02-21 21:33:00,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 21:33:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:00,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 21:33:00,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:33:00,940 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 11 states. [2021-02-21 21:33:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:01,818 INFO L93 Difference]: Finished difference Result 129 states and 172 transitions. [2021-02-21 21:33:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 21:33:01,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2021-02-21 21:33:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:01,831 INFO L225 Difference]: With dead ends: 129 [2021-02-21 21:33:01,831 INFO L226 Difference]: Without dead ends: 80 [2021-02-21 21:33:01,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:33:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-21 21:33:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 42. [2021-02-21 21:33:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-21 21:33:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-02-21 21:33:01,892 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2021-02-21 21:33:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:01,893 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-02-21 21:33:01,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 21:33:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-02-21 21:33:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-21 21:33:01,895 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:01,895 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] [2021-02-21 21:33:01,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:33:01,895 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1302396788, now seen corresponding path program 1 times [2021-02-21 21:33:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:01,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878626100] [2021-02-21 21:33:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:04,038 WARN L202 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2021-02-21 21:33:04,054 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:04,056 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:04,266 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-21 21:33:04,268 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-21 21:33:04,285 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-21 21:33:04,286 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-21 21:33:04,307 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-21 21:33:04,309 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-21 21:33:04,338 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-21 21:33:04,340 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-21 21:33:04,375 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-21 21:33:04,377 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-21 21:33:04,422 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-21 21:33:04,424 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-21 21:33:04,471 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-21 21:33:04,473 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-21 21:33:04,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:33:04,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:33:04,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 21:33:04,634 WARN L141 QuantifierPusher]: treesize reduction 28, result has 85.1 percent of original size [2021-02-21 21:33:04,639 WARN L147 QuantifierPusher]: treesize reduction 28, result has 85.1 percent of original size 160 [2021-02-21 21:33:04,760 WARN L141 QuantifierPusher]: treesize reduction 28, result has 83.9 percent of original size [2021-02-21 21:33:04,764 WARN L147 QuantifierPusher]: treesize reduction 28, result has 83.9 percent of original size 146 [2021-02-21 21:33:04,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:04,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:04,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:04,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:04,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:04,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:05,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878626100] [2021-02-21 21:33:05,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:05,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-21 21:33:05,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403534477] [2021-02-21 21:33:05,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-21 21:33:05,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-21 21:33:05,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:33:05,035 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 18 states. [2021-02-21 21:33:05,993 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-21 21:33:06,146 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-21 21:33:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:06,628 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-02-21 21:33:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:33:06,628 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2021-02-21 21:33:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:06,630 INFO L225 Difference]: With dead ends: 95 [2021-02-21 21:33:06,631 INFO L226 Difference]: Without dead ends: 90 [2021-02-21 21:33:06,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-02-21 21:33:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-21 21:33:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2021-02-21 21:33:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 21:33:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-02-21 21:33:06,655 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2021-02-21 21:33:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:06,656 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-02-21 21:33:06,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-21 21:33:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-02-21 21:33:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-21 21:33:06,657 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:06,658 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] [2021-02-21 21:33:06,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:33:06,658 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash -719189646, now seen corresponding path program 2 times [2021-02-21 21:33:06,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:06,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805171256] [2021-02-21 21:33:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:08,023 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2021-02-21 21:33:10,197 WARN L202 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2021-02-21 21:33:10,200 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:10,202 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:10,276 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:33:10,277 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:33:10,294 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:33:10,295 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:33:10,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:10,329 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:33:10,330 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 97 [2021-02-21 21:33:10,379 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:33:10,380 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 95 [2021-02-21 21:33:10,398 WARN L141 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size [2021-02-21 21:33:10,399 WARN L147 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size 1 [2021-02-21 21:33:10,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:10,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:10,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:10,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805171256] [2021-02-21 21:33:10,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:10,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:33:10,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166611364] [2021-02-21 21:33:10,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:33:10,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:33:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:33:10,485 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2021-02-21 21:33:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:11,024 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-02-21 21:33:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:33:11,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-02-21 21:33:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:11,028 INFO L225 Difference]: With dead ends: 70 [2021-02-21 21:33:11,028 INFO L226 Difference]: Without dead ends: 54 [2021-02-21 21:33:11,029 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 [2021-02-21 21:33:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-21 21:33:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-02-21 21:33:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-21 21:33:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-02-21 21:33:11,062 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-02-21 21:33:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:11,063 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-02-21 21:33:11,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:33:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-02-21 21:33:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-21 21:33:11,067 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:11,068 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] [2021-02-21 21:33:11,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:33:11,068 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1043250282, now seen corresponding path program 1 times [2021-02-21 21:33:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:11,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244726903] [2021-02-21 21:33:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:12,462 WARN L202 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2021-02-21 21:33:13,284 WARN L202 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2021-02-21 21:33:16,237 WARN L202 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2021-02-21 21:33:16,247 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:16,252 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:16,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:16,353 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:33:16,356 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:33:16,375 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:16,376 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:16,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:16,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:16,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244726903] [2021-02-21 21:33:16,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:16,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:16,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773993951] [2021-02-21 21:33:16,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:16,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:16,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:16,416 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2021-02-21 21:33:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:16,617 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-02-21 21:33:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:16,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-02-21 21:33:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:16,619 INFO L225 Difference]: With dead ends: 69 [2021-02-21 21:33:16,619 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 21:33:16,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 21:33:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-02-21 21:33:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-21 21:33:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-02-21 21:33:16,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-02-21 21:33:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:16,640 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-02-21 21:33:16,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-02-21 21:33:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:33:16,642 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:16,642 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] [2021-02-21 21:33:16,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:33:16,642 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:16,643 INFO L82 PathProgramCache]: Analyzing trace with hash 874367992, now seen corresponding path program 1 times [2021-02-21 21:33:16,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:16,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547297950] [2021-02-21 21:33:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:33,068 WARN L202 SmtUtils]: Spent 16.37 s on a formula simplification. DAG size of input: 8993 DAG size of output: 140 [2021-02-21 21:33:34,126 WARN L202 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2021-02-21 21:33:34,783 WARN L202 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-21 21:33:34,787 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:34,789 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:34,872 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-21 21:33:34,873 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-21 21:33:34,891 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-21 21:33:34,893 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-21 21:33:34,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:34,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:34,924 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-21 21:33:34,925 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 110 [2021-02-21 21:33:35,001 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.8 percent of original size [2021-02-21 21:33:35,003 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.8 percent of original size 109 [2021-02-21 21:33:35,087 WARN L141 QuantifierPusher]: treesize reduction 12, result has 67.6 percent of original size [2021-02-21 21:33:35,088 WARN L147 QuantifierPusher]: treesize reduction 12, result has 67.6 percent of original size 25 [2021-02-21 21:33:35,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:35,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 21:33:35,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:35,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:35,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:35,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:35,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:35,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:35,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:35,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547297950] [2021-02-21 21:33:35,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:35,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 21:33:35,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519103780] [2021-02-21 21:33:35,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 21:33:35,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:35,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 21:33:35,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:33:35,260 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2021-02-21 21:33:35,760 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-21 21:33:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:38,303 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-02-21 21:33:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:33:38,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2021-02-21 21:33:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:38,306 INFO L225 Difference]: With dead ends: 68 [2021-02-21 21:33:38,306 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 21:33:38,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:33:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 21:33:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-02-21 21:33:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-21 21:33:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-02-21 21:33:38,330 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2021-02-21 21:33:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:38,330 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-02-21 21:33:38,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 21:33:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-02-21 21:33:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-21 21:33:38,331 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:38,332 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] [2021-02-21 21:33:38,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:33:38,332 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash 964039088, now seen corresponding path program 1 times [2021-02-21 21:33:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:38,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586858705] [2021-02-21 21:33:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:40,405 WARN L202 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 179 DAG size of output: 123 [2021-02-21 21:33:41,698 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-21 21:37:30,992 WARN L202 SmtUtils]: Spent 3.75 m on a formula simplification. DAG size of input: 699537 DAG size of output: 113 [2021-02-21 21:37:30,996 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:37:30,997 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:37:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:37:31,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:31,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:31,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:31,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:37:31,041 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:37:31,042 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:37:31,065 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:37:31,066 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:37:31,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:31,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:31,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:37:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:37:31,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:31,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:37:31,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586858705] [2021-02-21 21:37:31,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:37:31,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:37:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418871749] [2021-02-21 21:37:31,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:37:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:37:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:37:31,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:37:31,109 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2021-02-21 21:37:31,395 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-21 21:37:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:37:31,553 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-02-21 21:37:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:37:31,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-02-21 21:37:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:37:31,555 INFO L225 Difference]: With dead ends: 67 [2021-02-21 21:37:31,555 INFO L226 Difference]: Without dead ends: 51 [2021-02-21 21:37:31,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:37:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-21 21:37:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-02-21 21:37:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-21 21:37:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-02-21 21:37:31,578 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2021-02-21 21:37:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:37:31,578 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-02-21 21:37:31,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:37:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-02-21 21:37:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-21 21:37:31,579 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:37:31,580 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, 1, 1] [2021-02-21 21:37:31,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:37:31,580 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:37:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:37:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 265046544, now seen corresponding path program 1 times [2021-02-21 21:37:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:37:31,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621549597] [2021-02-21 21:37:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:37:33,339 WARN L202 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2021-02-21 21:37:34,116 WARN L202 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-21 21:37:35,475 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2021-02-21 21:37:35,478 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:37:35,480 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:37:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:37:35,564 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-21 21:37:35,565 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-21 21:37:35,585 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-21 21:37:35,586 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-21 21:37:35,610 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-21 21:37:35,611 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-21 21:37:35,642 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-21 21:37:35,644 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-21 21:37:35,689 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-21 21:37:35,690 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-21 21:37:35,737 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-21 21:37:35,744 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-21 21:37:35,801 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-21 21:37:35,805 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-21 21:37:35,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:35,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:37:35,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:35,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 21:37:35,950 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.0 percent of original size [2021-02-21 21:37:35,952 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.0 percent of original size 48 [2021-02-21 21:37:36,034 WARN L141 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-02-21 21:37:36,036 WARN L147 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size 52 [2021-02-21 21:37:36,110 WARN L141 QuantifierPusher]: treesize reduction 7, result has 89.4 percent of original size [2021-02-21 21:37:36,112 WARN L147 QuantifierPusher]: treesize reduction 7, result has 89.4 percent of original size 59 [2021-02-21 21:37:36,188 WARN L141 QuantifierPusher]: treesize reduction 28, result has 85.3 percent of original size [2021-02-21 21:37:36,191 WARN L147 QuantifierPusher]: treesize reduction 28, result has 85.3 percent of original size 162 [2021-02-21 21:37:36,338 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-02-21 21:37:36,355 WARN L141 QuantifierPusher]: treesize reduction 28, result has 84.4 percent of original size [2021-02-21 21:37:36,358 WARN L147 QuantifierPusher]: treesize reduction 28, result has 84.4 percent of original size 151 [2021-02-21 21:37:36,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:36,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:37:36,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:36,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:37:36,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:36,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:36,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:37:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:37:36,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:36,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:36,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:36,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:37:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:37:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621549597] [2021-02-21 21:37:36,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:37:36,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-21 21:37:36,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865579319] [2021-02-21 21:37:36,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-21 21:37:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:37:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-21 21:37:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:37:36,636 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 20 states. [2021-02-21 21:37:37,322 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-21 21:37:37,460 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-21 21:37:37,659 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-21 21:37:37,841 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-21 21:37:38,038 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-21 21:37:38,261 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-21 21:37:38,451 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-21 21:37:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:37:38,860 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-02-21 21:37:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:37:38,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2021-02-21 21:37:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:37:38,862 INFO L225 Difference]: With dead ends: 78 [2021-02-21 21:37:38,862 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 21:37:38,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-02-21 21:37:38,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 21:37:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-02-21 21:37:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-21 21:37:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-02-21 21:37:38,886 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2021-02-21 21:37:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:37:38,886 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-02-21 21:37:38,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-21 21:37:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-02-21 21:37:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:37:38,888 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:37:38,888 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] [2021-02-21 21:37:38,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:37:38,888 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:37:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:37:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1073286922, now seen corresponding path program 2 times [2021-02-21 21:37:38,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:37:38,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168365687] [2021-02-21 21:37:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:37:41,345 WARN L202 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 184 DAG size of output: 149 [2021-02-21 21:37:43,212 WARN L202 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2021-02-21 21:37:44,586 WARN L202 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 901 DAG size of output: 89