/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-b7b32d2 [2021-02-21 21:33:03,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:33:03,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:33:03,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:33:03,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:33:03,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:33:03,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:33:03,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:33:03,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:33:03,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:33:03,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:33:03,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:33:03,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:33:03,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:33:03,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:33:03,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:33:03,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:33:03,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:33:03,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:33:03,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:33:03,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:33:03,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:33:03,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:33:03,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:33:03,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:33:03,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:33:03,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:33:03,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:33:03,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:33:03,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:33:03,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:33:03,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:33:03,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:33:03,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:33:03,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:33:03,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:33:03,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:33:03,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:33:03,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:33:03,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:33:03,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:33:03,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:33:03,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:33:03,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:33:03,379 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:33:03,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:33:03,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:33:03,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:33:03,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:33:03,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:33:03,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:33:03,382 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:33:03,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:33:03,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:33:03,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:33:03,928 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:33:03,929 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:33:03,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-02-21 21:33:04,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b82121bb/92e5aa1c0daa4c168e78aa55daa5e379/FLAGb1a3d16ab [2021-02-21 21:33:04,766 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:33:04,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-02-21 21:33:04,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b82121bb/92e5aa1c0daa4c168e78aa55daa5e379/FLAGb1a3d16ab [2021-02-21 21:33:05,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b82121bb/92e5aa1c0daa4c168e78aa55daa5e379 [2021-02-21 21:33:05,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:33:05,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:33:05,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:33:05,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:33:05,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:33:05,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29123c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05, skipping insertion in model container [2021-02-21 21:33:05,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:33:05,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:33:05,478 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] [2021-02-21 21:33:05,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:33:05,515 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:33:05,534 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] [2021-02-21 21:33:05,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:33:05,570 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:33:05,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05 WrapperNode [2021-02-21 21:33:05,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:33:05,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:33:05,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:33:05,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:33:05,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... [2021-02-21 21:33:05,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:33:05,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:33:05,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:33:05,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:33:05,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:33:05,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:33:05,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:33:05,774 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:33:05,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:33:05,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:33:05,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:33:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:33:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:33:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:33:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:33:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:33:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:33:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:33:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:33:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:33:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:33:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:33:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:33:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:33:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:33:06,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:33:06,232 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:33:06,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:33:06 BoogieIcfgContainer [2021-02-21 21:33:06,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:33:06,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:33:06,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:33:06,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:33:06,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:33:05" (1/3) ... [2021-02-21 21:33:06,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bd1942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:33:06, skipping insertion in model container [2021-02-21 21:33:06,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:05" (2/3) ... [2021-02-21 21:33:06,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bd1942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:33:06, skipping insertion in model container [2021-02-21 21:33:06,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:33:06" (3/3) ... [2021-02-21 21:33:06,245 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2021-02-21 21:33:06,254 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:33:06,260 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:33:06,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:33:06,404 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:33:06,404 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:33:06,404 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:33:06,404 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:33:06,404 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:33:06,405 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:33:06,405 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:33:06,405 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:33:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2021-02-21 21:33:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 21:33:06,441 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:06,442 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] [2021-02-21 21:33:06,443 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:06,451 INFO L82 PathProgramCache]: Analyzing trace with hash 948591750, now seen corresponding path program 1 times [2021-02-21 21:33:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:06,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252517482] [2021-02-21 21:33:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:06,558 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:07,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:07,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:07,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:07,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:07,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:07,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:07,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:33:07,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:33:07,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:33:07,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:33:07,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:33:07,469 WARN L141 QuantifierPusher]: treesize reduction 34, result has 83.1 percent of original size [2021-02-21 21:33:07,476 WARN L147 QuantifierPusher]: treesize reduction 34, result has 83.1 percent of original size 167 [2021-02-21 21:33:07,636 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-02-21 21:33:07,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:07,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:07,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:07,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:07,783 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 21:33:07,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252517482] [2021-02-21 21:33:07,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:07,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:33:07,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479582530] [2021-02-21 21:33:07,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:33:07,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:33:07,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:33:07,827 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 16 states. [2021-02-21 21:33:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:09,773 INFO L93 Difference]: Finished difference Result 181 states and 248 transitions. [2021-02-21 21:33:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 21:33:09,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2021-02-21 21:33:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:09,789 INFO L225 Difference]: With dead ends: 181 [2021-02-21 21:33:09,789 INFO L226 Difference]: Without dead ends: 130 [2021-02-21 21:33:09,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-02-21 21:33:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-21 21:33:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 60. [2021-02-21 21:33:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-21 21:33:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-02-21 21:33:09,879 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 35 [2021-02-21 21:33:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:09,880 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-02-21 21:33:09,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:33:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-02-21 21:33:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:33:09,883 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:09,883 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] [2021-02-21 21:33:09,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:33:09,884 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1775592559, now seen corresponding path program 1 times [2021-02-21 21:33:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:09,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495727485] [2021-02-21 21:33:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:16,193 WARN L202 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 449 DAG size of output: 200 [2021-02-21 21:33:16,224 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:16,227 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:16,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:16,325 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:33:16,327 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:33:16,352 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:16,353 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:16,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:16,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:33:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:16,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,425 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 21:33:16,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495727485] [2021-02-21 21:33:16,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:16,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:16,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965934318] [2021-02-21 21:33:16,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:16,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:16,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:16,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:16,431 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 5 states. [2021-02-21 21:33:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:16,820 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2021-02-21 21:33:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:16,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-02-21 21:33:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:16,825 INFO L225 Difference]: With dead ends: 100 [2021-02-21 21:33:16,825 INFO L226 Difference]: Without dead ends: 76 [2021-02-21 21:33:16,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-21 21:33:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-02-21 21:33:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-21 21:33:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-02-21 21:33:16,863 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2021-02-21 21:33:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:16,864 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-02-21 21:33:16,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-02-21 21:33:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 21:33:16,870 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:16,871 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] [2021-02-21 21:33:16,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:33:16,871 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:16,872 INFO L82 PathProgramCache]: Analyzing trace with hash -746409004, now seen corresponding path program 1 times [2021-02-21 21:33:16,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:16,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663710880] [2021-02-21 21:33:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:22,621 WARN L202 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 529 DAG size of output: 255 [2021-02-21 21:33:22,628 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:22,630 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:22,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:22,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:22,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:22,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:22,817 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-21 21:33:22,819 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-21 21:33:22,886 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:33:22,894 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-21 21:33:22,925 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-21 21:33:22,927 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-21 21:33:22,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:22,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:22,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:23,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:23,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:23,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:33:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:23,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:23,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:23,053 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 21:33:23,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663710880] [2021-02-21 21:33:23,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:23,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:23,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562737763] [2021-02-21 21:33:23,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:23,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:23,062 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2021-02-21 21:33:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:23,589 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-02-21 21:33:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:23,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-02-21 21:33:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:23,592 INFO L225 Difference]: With dead ends: 99 [2021-02-21 21:33:23,592 INFO L226 Difference]: Without dead ends: 75 [2021-02-21 21:33:23,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-21 21:33:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-02-21 21:33:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 21:33:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-02-21 21:33:23,627 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 45 [2021-02-21 21:33:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:23,627 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-02-21 21:33:23,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-02-21 21:33:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-21 21:33:23,629 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:23,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:23,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:33:23,630 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1447271223, now seen corresponding path program 1 times [2021-02-21 21:33:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:23,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441391689] [2021-02-21 21:33:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:33,365 WARN L202 SmtUtils]: Spent 9.71 s on a formula simplification. DAG size of input: 453 DAG size of output: 280 [2021-02-21 21:33:33,372 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:33,373 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:33,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:33,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:33,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:33,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:33,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:33,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-21 21:33:33,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:33,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:33,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:33,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:33,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:33,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:33:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:33,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:33,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441391689] [2021-02-21 21:33:33,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:33,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877454775] [2021-02-21 21:33:33,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:33,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:33,545 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 5 states. [2021-02-21 21:33:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:34,010 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2021-02-21 21:33:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:34,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-02-21 21:33:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:34,013 INFO L225 Difference]: With dead ends: 89 [2021-02-21 21:33:34,014 INFO L226 Difference]: Without dead ends: 65 [2021-02-21 21:33:34,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-21 21:33:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-02-21 21:33:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-21 21:33:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-02-21 21:33:34,048 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 46 [2021-02-21 21:33:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:34,049 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-02-21 21:33:34,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-02-21 21:33:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 21:33:34,051 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:34,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:34,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:33:34,052 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1527388626, now seen corresponding path program 1 times [2021-02-21 21:33:34,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:34,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598904247] [2021-02-21 21:33:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:38,321 WARN L202 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 529 DAG size of output: 191 [2021-02-21 21:33:38,327 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:38,329 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:38,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:38,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:38,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:38,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:38,465 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-21 21:33:38,467 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 87 [2021-02-21 21:33:38,515 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:33:38,522 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 95 [2021-02-21 21:33:38,547 WARN L141 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size [2021-02-21 21:33:38,548 WARN L147 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size 1 [2021-02-21 21:33:38,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:38,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:38,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:38,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:38,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:38,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:33:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:38,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:38,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:38,634 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 21:33:38,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598904247] [2021-02-21 21:33:38,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:38,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:38,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499452721] [2021-02-21 21:33:38,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:38,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:38,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:38,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:38,645 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 5 states. [2021-02-21 21:33:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:39,127 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-02-21 21:33:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:39,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2021-02-21 21:33:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:39,130 INFO L225 Difference]: With dead ends: 97 [2021-02-21 21:33:39,130 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 21:33:39,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 21:33:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2021-02-21 21:33:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-21 21:33:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-02-21 21:33:39,192 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 47 [2021-02-21 21:33:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:39,192 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-02-21 21:33:39,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-02-21 21:33:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:33:39,196 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:39,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:39,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:33:39,196 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:39,198 INFO L82 PathProgramCache]: Analyzing trace with hash 455714083, now seen corresponding path program 1 times [2021-02-21 21:33:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:39,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842765667] [2021-02-21 21:33:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:46,824 WARN L202 SmtUtils]: Spent 7.61 s on a formula simplification. DAG size of input: 438 DAG size of output: 218 [2021-02-21 21:33:46,830 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:46,832 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:46,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:46,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:46,888 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:33:46,891 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:33:46,917 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:46,918 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:46,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:46,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:46,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:46,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:33:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:46,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:46,985 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 21:33:46,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842765667] [2021-02-21 21:33:46,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:46,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:46,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376895796] [2021-02-21 21:33:46,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:46,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:46,988 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2021-02-21 21:33:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:47,385 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2021-02-21 21:33:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:47,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2021-02-21 21:33:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:47,387 INFO L225 Difference]: With dead ends: 96 [2021-02-21 21:33:47,388 INFO L226 Difference]: Without dead ends: 72 [2021-02-21 21:33:47,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-21 21:33:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-02-21 21:33:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-21 21:33:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-02-21 21:33:47,422 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 48 [2021-02-21 21:33:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:47,422 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-02-21 21:33:47,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-02-21 21:33:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 21:33:47,424 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:47,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:47,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:33:47,425 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1974130824, now seen corresponding path program 1 times [2021-02-21 21:33:47,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:47,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382964527] [2021-02-21 21:33:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:54,927 WARN L202 SmtUtils]: Spent 7.48 s on a formula simplification. DAG size of input: 450 DAG size of output: 200 [2021-02-21 21:33:54,932 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:54,933 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:55,040 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:33:55,042 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:33:55,065 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:33:55,069 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:33:55,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:55,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:55,117 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-21 21:33:55,119 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 110 [2021-02-21 21:33:55,184 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size [2021-02-21 21:33:55,187 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size 101 [2021-02-21 21:33:55,215 WARN L141 QuantifierPusher]: treesize reduction 6, result has 93.9 percent of original size [2021-02-21 21:33:55,219 WARN L147 QuantifierPusher]: treesize reduction 6, result has 93.9 percent of original size 92 [2021-02-21 21:33:55,276 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:55,277 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:55,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:55,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:55,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:55,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:55,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:55,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:55,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:55,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:33:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:55,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:55,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:55,397 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 21:33:55,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382964527] [2021-02-21 21:33:55,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:55,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:33:55,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940595802] [2021-02-21 21:33:55,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:33:55,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:33:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:33:55,400 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 9 states. [2021-02-21 21:33:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:56,344 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-02-21 21:33:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:33:56,345 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2021-02-21 21:33:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:56,347 INFO L225 Difference]: With dead ends: 95 [2021-02-21 21:33:56,347 INFO L226 Difference]: Without dead ends: 71 [2021-02-21 21:33:56,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:33:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-21 21:33:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-02-21 21:33:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-21 21:33:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-02-21 21:33:56,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 49 [2021-02-21 21:33:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:56,383 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-02-21 21:33:56,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:33:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-02-21 21:33:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-21 21:33:56,384 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:56,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:33:56,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:33:56,385 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1972184445, now seen corresponding path program 1 times [2021-02-21 21:33:56,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:56,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513449574] [2021-02-21 21:33:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:02,459 WARN L202 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 529 DAG size of output: 255 [2021-02-21 21:34:02,466 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:02,469 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:02,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:02,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:02,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:02,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:34:02,540 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:34:02,541 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:34:02,561 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:34:02,561 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:34:02,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:02,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:02,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:02,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:02,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:02,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:34:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:02,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:02,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:34:02,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513449574] [2021-02-21 21:34:02,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:02,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:34:02,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722114114] [2021-02-21 21:34:02,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:34:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:34:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:34:02,629 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 5 states. [2021-02-21 21:34:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:03,012 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-02-21 21:34:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:34:03,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2021-02-21 21:34:03,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:03,015 INFO L225 Difference]: With dead ends: 94 [2021-02-21 21:34:03,015 INFO L226 Difference]: Without dead ends: 70 [2021-02-21 21:34:03,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:34:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-21 21:34:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-02-21 21:34:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-21 21:34:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2021-02-21 21:34:03,053 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 50 [2021-02-21 21:34:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:03,054 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2021-02-21 21:34:03,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:34:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2021-02-21 21:34:03,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-21 21:34:03,055 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:03,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:34:03,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:34:03,056 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash 425615645, now seen corresponding path program 1 times [2021-02-21 21:34:03,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:03,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195923712] [2021-02-21 21:34:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:12,870 WARN L202 SmtUtils]: Spent 9.79 s on a formula simplification. DAG size of input: 464 DAG size of output: 252 [2021-02-21 21:34:12,878 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:12,880 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:12,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:12,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:12,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:12,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:34:12,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:12,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:34:12,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:12,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:34:12,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:12,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:34:13,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:34:13,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:34:13,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:34:13,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:34:13,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:34:13,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:34:13,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:34:13,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-21 21:34:13,305 WARN L141 QuantifierPusher]: treesize reduction 34, result has 83.5 percent of original size [2021-02-21 21:34:13,313 WARN L147 QuantifierPusher]: treesize reduction 34, result has 83.5 percent of original size 172 [2021-02-21 21:34:13,471 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-21 21:34:13,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:34:13,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:34:13,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:13,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:13,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:13,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:34:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:13,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:13,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:34:13,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195923712] [2021-02-21 21:34:13,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:13,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-21 21:34:13,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192457924] [2021-02-21 21:34:13,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-21 21:34:13,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:13,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-21 21:34:13,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:34:13,638 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 18 states. [2021-02-21 21:34:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:15,503 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2021-02-21 21:34:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 21:34:15,504 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2021-02-21 21:34:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:15,506 INFO L225 Difference]: With dead ends: 111 [2021-02-21 21:34:15,506 INFO L226 Difference]: Without dead ends: 109 [2021-02-21 21:34:15,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-02-21 21:34:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-21 21:34:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2021-02-21 21:34:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-21 21:34:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-02-21 21:34:15,549 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 50 [2021-02-21 21:34:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:15,550 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-02-21 21:34:15,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-21 21:34:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-02-21 21:34:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-21 21:34:15,551 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:15,551 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] [2021-02-21 21:34:15,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:34:15,552 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1956092344, now seen corresponding path program 2 times [2021-02-21 21:34:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:15,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568457564] [2021-02-21 21:34:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY