/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/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:32:45,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:32:45,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:32:45,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:32:45,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:32:45,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:32:45,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:32:45,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:32:45,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:32:45,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:32:45,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:32:45,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:32:45,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:32:45,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:32:45,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:32:45,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:32:45,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:32:45,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:32:45,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:32:45,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:32:45,281 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 21:32:45,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:32:45,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:32:45,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:32:45,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:32:45,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:32:45,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:32:45,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:32:45,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:32:45,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:32:45,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:32:45,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:32:45,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:32:45,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:32:45,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:32:45,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:32:45,315 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:32:45,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:32:45,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:32:45,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:32:45,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:32:45,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:32:45,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:32:45,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:32:45,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:32:45,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:32:45,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:32:45,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:32:45,751 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:32:45,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2021-02-21 21:32:45,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72a6823f0/7285f18a613647f082efecb923acea94/FLAG76c0f5d17 [2021-02-21 21:32:46,440 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:32:46,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2021-02-21 21:32:46,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72a6823f0/7285f18a613647f082efecb923acea94/FLAG76c0f5d17 [2021-02-21 21:32:46,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72a6823f0/7285f18a613647f082efecb923acea94 [2021-02-21 21:32:46,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:32:46,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:32:46,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:46,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:32:46,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:32:46,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:46" (1/1) ... [2021-02-21 21:32:46,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a3aa1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:46, skipping insertion in model container [2021-02-21 21:32:46,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:46" (1/1) ... [2021-02-21 21:32:46,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:32:46,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:32:47,016 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/sumt3.c[403,416] [2021-02-21 21:32:47,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:47,040 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:32:47,056 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/sumt3.c[403,416] [2021-02-21 21:32:47,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:47,080 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:32:47,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47 WrapperNode [2021-02-21 21:32:47,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:47,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:32:47,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:32:47,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:32:47,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (1/1) ... [2021-02-21 21:32:47,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (1/1) ... [2021-02-21 21:32:47,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (1/1) ... [2021-02-21 21:32:47,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (1/1) ... [2021-02-21 21:32:47,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (1/1) ... [2021-02-21 21:32:47,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (1/1) ... [2021-02-21 21:32:47,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (1/1) ... [2021-02-21 21:32:47,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:32:47,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:32:47,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:32:47,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:32:47,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (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 21:32:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:32:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:32:47,253 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:32:47,253 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:32:47,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:32:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:32:47,254 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:32:47,254 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:32:47,254 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:32:47,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:32:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:32:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:32:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 21:32:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:32:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:32:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:32:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:32:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:32:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:32:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:32:47,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:32:47,811 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:32:47,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:47 BoogieIcfgContainer [2021-02-21 21:32:47,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:32:47,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:32:47,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:32:47,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:32:47,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:32:46" (1/3) ... [2021-02-21 21:32:47,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d94128e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:47, skipping insertion in model container [2021-02-21 21:32:47,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:47" (2/3) ... [2021-02-21 21:32:47,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d94128e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:47, skipping insertion in model container [2021-02-21 21:32:47,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:47" (3/3) ... [2021-02-21 21:32:47,822 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt3.c [2021-02-21 21:32:47,829 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:32:47,834 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:32:47,854 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:32:47,883 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:32:47,883 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:32:47,883 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:32:47,884 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:32:47,884 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:32:47,884 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:32:47,884 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:32:47,884 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:32:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-21 21:32:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 21:32:47,912 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:47,913 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] [2021-02-21 21:32:47,913 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash 264394004, now seen corresponding path program 1 times [2021-02-21 21:32:47,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:47,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852657998] [2021-02-21 21:32:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:48,017 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:48,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:48,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:48,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:32:48,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:32:48,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:32:48,488 WARN L141 QuantifierPusher]: treesize reduction 22, result has 70.3 percent of original size [2021-02-21 21:32:48,493 WARN L147 QuantifierPusher]: treesize reduction 22, result has 70.3 percent of original size 52 [2021-02-21 21:32:48,572 WARN L141 QuantifierPusher]: treesize reduction 23, result has 80.7 percent of original size [2021-02-21 21:32:48,581 WARN L147 QuantifierPusher]: treesize reduction 23, result has 80.7 percent of original size 96 [2021-02-21 21:32:48,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:48,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:48,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:48,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:48,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:48,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:48,703 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 21:32:48,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852657998] [2021-02-21 21:32:48,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:48,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:32:48,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441352811] [2021-02-21 21:32:48,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:32:48,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:48,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:32:48,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:32:48,730 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 9 states. [2021-02-21 21:32:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:49,307 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-02-21 21:32:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:32:49,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2021-02-21 21:32:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:49,321 INFO L225 Difference]: With dead ends: 76 [2021-02-21 21:32:49,321 INFO L226 Difference]: Without dead ends: 40 [2021-02-21 21:32:49,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:32:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-21 21:32:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-21 21:32:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 21:32:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-21 21:32:49,428 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2021-02-21 21:32:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:49,429 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-21 21:32:49,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:32:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-21 21:32:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 21:32:49,437 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:49,437 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] [2021-02-21 21:32:49,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:32:49,438 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:49,439 INFO L82 PathProgramCache]: Analyzing trace with hash -902518074, now seen corresponding path program 1 times [2021-02-21 21:32:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:49,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269911342] [2021-02-21 21:32:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:50,156 WARN L202 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-21 21:32:50,173 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:32:50,175 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:50,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:50,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:50,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:50,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:50,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:50,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:32:50,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-21 21:32:50,413 WARN L141 QuantifierPusher]: treesize reduction 24, result has 83.4 percent of original size [2021-02-21 21:32:50,417 WARN L147 QuantifierPusher]: treesize reduction 24, result has 83.4 percent of original size 121 [2021-02-21 21:32:50,516 WARN L141 QuantifierPusher]: treesize reduction 24, result has 83.8 percent of original size [2021-02-21 21:32:50,520 WARN L147 QuantifierPusher]: treesize reduction 24, result has 83.8 percent of original size 124 [2021-02-21 21:32:50,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:50,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:50,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:50,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:50,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:50,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:50,676 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 21:32:50,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269911342] [2021-02-21 21:32:50,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:50,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 21:32:50,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460551536] [2021-02-21 21:32:50,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 21:32:50,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:50,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 21:32:50,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:32:50,680 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2021-02-21 21:32:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:51,322 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-02-21 21:32:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 21:32:51,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2021-02-21 21:32:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:51,325 INFO L225 Difference]: With dead ends: 52 [2021-02-21 21:32:51,325 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 21:32:51,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-02-21 21:32:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 21:32:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-02-21 21:32:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-21 21:32:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-02-21 21:32:51,355 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34 [2021-02-21 21:32:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:51,356 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-02-21 21:32:51,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 21:32:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-02-21 21:32:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-21 21:32:51,357 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:51,357 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] [2021-02-21 21:32:51,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:32:51,358 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1287596168, now seen corresponding path program 2 times [2021-02-21 21:32:51,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053018490] [2021-02-21 21:32:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:52,623 WARN L202 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-21 21:32:57,477 WARN L202 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 3247 DAG size of output: 146 [2021-02-21 21:32:57,484 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:32:57,492 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:57,669 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:32:57,670 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:32:57,688 WARN L141 QuantifierPusher]: treesize reduction 10, result has 47.4 percent of original size [2021-02-21 21:32:57,689 WARN L147 QuantifierPusher]: treesize reduction 10, result has 47.4 percent of original size 9 [2021-02-21 21:32:57,695 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-21 21:32:57,696 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-21 21:32:57,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:57,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 21:32:57,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:57,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-02-21 21:32:57,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:57,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-02-21 21:32:57,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:57,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:57,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:57,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:57,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:57,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:57,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:57,899 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 21:32:57,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053018490] [2021-02-21 21:32:57,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:57,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:32:57,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362459013] [2021-02-21 21:32:57,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:32:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:57,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:32:57,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:32:57,902 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2021-02-21 21:32:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:58,247 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-02-21 21:32:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:32:58,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2021-02-21 21:32:58,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:58,249 INFO L225 Difference]: With dead ends: 56 [2021-02-21 21:32:58,249 INFO L226 Difference]: Without dead ends: 44 [2021-02-21 21:32:58,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:32:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-21 21:32:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-02-21 21:32:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-21 21:32:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-02-21 21:32:58,266 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-02-21 21:32:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:58,267 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-02-21 21:32:58,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:32:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-02-21 21:32:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:32:58,268 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:58,268 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 21:32:58,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:32:58,269 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1964808003, now seen corresponding path program 1 times [2021-02-21 21:32:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:58,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308911749] [2021-02-21 21:32:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:59,608 WARN L202 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-21 21:33:00,437 WARN L202 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2021-02-21 21:33:02,898 WARN L202 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 164 DAG size of output: 143 [2021-02-21 21:33:02,905 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:02,907 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:02,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:02,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:02,955 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:33:02,956 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:33:02,976 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:02,976 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:02,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:03,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:03,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:03,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:03,026 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 21:33:03,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308911749] [2021-02-21 21:33:03,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:03,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:03,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571602968] [2021-02-21 21:33:03,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:03,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:03,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:03,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:03,044 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2021-02-21 21:33:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:03,241 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-02-21 21:33:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:03,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2021-02-21 21:33:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:03,243 INFO L225 Difference]: With dead ends: 58 [2021-02-21 21:33:03,244 INFO L226 Difference]: Without dead ends: 46 [2021-02-21 21:33:03,244 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 21:33:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-21 21:33:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-02-21 21:33:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-21 21:33:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-21 21:33:03,261 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2021-02-21 21:33:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:03,261 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-21 21:33:03,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-21 21:33:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:33:03,263 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:03,263 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 21:33:03,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:33:03,264 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1631166749, now seen corresponding path program 1 times [2021-02-21 21:33:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:03,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957579295] [2021-02-21 21:33:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:04,512 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-21 21:33:05,319 WARN L202 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-21 21:33:07,001 WARN L202 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2021-02-21 21:33:07,007 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:07,009 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:07,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:07,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:07,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:07,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:07,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:07,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:33:07,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-21 21:33:07,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:33:07,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:33:07,220 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size [2021-02-21 21:33:07,223 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size 145 [2021-02-21 21:33:07,337 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-21 21:33:07,340 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 149 [2021-02-21 21:33:07,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:07,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:07,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:07,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:07,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:07,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:07,523 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 21:33:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957579295] [2021-02-21 21:33:07,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:07,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 21:33:07,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843759768] [2021-02-21 21:33:07,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 21:33:07,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 21:33:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:33:07,529 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 15 states. [2021-02-21 21:33:08,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:08,375 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-21 21:33:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-21 21:33:08,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2021-02-21 21:33:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:08,378 INFO L225 Difference]: With dead ends: 57 [2021-02-21 21:33:08,378 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 21:33:08,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-02-21 21:33:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 21:33:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-02-21 21:33:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-21 21:33:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-02-21 21:33:08,395 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2021-02-21 21:33:08,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:08,395 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-02-21 21:33:08,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 21:33:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-02-21 21:33:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 21:33:08,396 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:08,397 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] [2021-02-21 21:33:08,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:33:08,397 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1213937073, now seen corresponding path program 2 times [2021-02-21 21:33:08,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:08,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714936144] [2021-02-21 21:33:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:09,104 WARN L202 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-21 21:33:11,128 WARN L202 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 920 DAG size of output: 96 [2021-02-21 21:33:14,339 WARN L202 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 1250 DAG size of output: 110 [2021-02-21 21:33:16,655 WARN L202 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1231 DAG size of output: 128 [2021-02-21 21:33:16,658 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:16,659 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:16,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:33:16,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:16,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-21 21:33:16,789 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-21 21:33:16,791 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 111 [2021-02-21 21:33:16,828 WARN L141 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size [2021-02-21 21:33:16,829 WARN L147 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size 92 [2021-02-21 21:33:16,865 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:16,867 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:16,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:16,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:16,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:16,935 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 21:33:16,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714936144] [2021-02-21 21:33:16,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:16,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 21:33:16,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834217866] [2021-02-21 21:33:16,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 21:33:16,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 21:33:16,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:16,949 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 7 states. [2021-02-21 21:33:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:17,734 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-02-21 21:33:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:33:17,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2021-02-21 21:33:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:17,736 INFO L225 Difference]: With dead ends: 65 [2021-02-21 21:33:17,736 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 21:33:17,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:33:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 21:33:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-02-21 21:33:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-21 21:33:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-02-21 21:33:17,755 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2021-02-21 21:33:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:17,755 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-02-21 21:33:17,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 21:33:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-02-21 21:33:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:33:17,756 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:17,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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 21:33:17,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:33:17,757 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash 318623942, now seen corresponding path program 1 times [2021-02-21 21:33:17,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:17,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396136275] [2021-02-21 21:33:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:19,118 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-21 21:33:21,916 WARN L202 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 2936 DAG size of output: 96 [2021-02-21 21:33:25,649 WARN L202 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 2935 DAG size of output: 95 [2021-02-21 21:33:26,866 WARN L202 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 186 DAG size of output: 110 [2021-02-21 21:33:41,973 WARN L202 SmtUtils]: Spent 15.06 s on a formula simplification. DAG size of input: 9242 DAG size of output: 141 [2021-02-21 21:33:41,975 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:41,977 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:42,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:42,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:42,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:42,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:42,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:42,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:33:42,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-21 21:33:42,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:33:42,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:33:42,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-21 21:33:42,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:33:42,254 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size [2021-02-21 21:33:42,257 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size 146 [2021-02-21 21:33:42,371 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-21 21:33:42,373 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 150 [2021-02-21 21:33:42,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:42,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:42,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:42,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:42,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:42,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:42,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396136275] [2021-02-21 21:33:42,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:42,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:33:42,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572977515] [2021-02-21 21:33:42,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:33:42,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:33:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:33:42,570 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 17 states. [2021-02-21 21:33:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:43,726 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-02-21 21:33:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:33:43,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2021-02-21 21:33:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:43,732 INFO L225 Difference]: With dead ends: 68 [2021-02-21 21:33:43,732 INFO L226 Difference]: Without dead ends: 62 [2021-02-21 21:33:43,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-02-21 21:33:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-21 21:33:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-02-21 21:33:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-21 21:33:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-02-21 21:33:43,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 44 [2021-02-21 21:33:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:43,763 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-02-21 21:33:43,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:33:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-02-21 21:33:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:33:43,765 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:43,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-02-21 21:33:43,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:33:43,765 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2029585032, now seen corresponding path program 2 times [2021-02-21 21:33:43,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:43,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893889386] [2021-02-21 21:33:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:44,514 WARN L202 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-21 21:33:45,427 WARN L202 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-21 21:33:46,329 WARN L202 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2021-02-21 21:33:47,253 WARN L202 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2021-02-21 21:33:48,374 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 185 DAG size of output: 96 [2021-02-21 21:33:49,686 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 186 DAG size of output: 110 [2021-02-21 21:33:51,288 WARN L202 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2021-02-21 21:33:51,290 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:51,292 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:51,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:51,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:51,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:51,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:51,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:51,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:51,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:33:51,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 21:33:51,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:33:51,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 21:33:51,587 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-21 21:33:51,589 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 34 [2021-02-21 21:33:51,643 WARN L141 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size [2021-02-21 21:33:51,645 WARN L147 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size 37 [2021-02-21 21:33:51,687 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.4 percent of original size [2021-02-21 21:33:51,688 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.4 percent of original size 41 [2021-02-21 21:33:51,734 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size [2021-02-21 21:33:51,738 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size 146 [2021-02-21 21:33:51,873 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-21 21:33:51,875 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 150 [2021-02-21 21:33:51,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:51,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:52,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:52,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:52,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:52,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:52,119 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 21:33:52,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893889386] [2021-02-21 21:33:52,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:52,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 21:33:52,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740487210] [2021-02-21 21:33:52,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 21:33:52,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 21:33:52,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:33:52,122 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2021-02-21 21:33:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:53,643 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-02-21 21:33:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:33:53,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2021-02-21 21:33:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:53,646 INFO L225 Difference]: With dead ends: 88 [2021-02-21 21:33:53,646 INFO L226 Difference]: Without dead ends: 64 [2021-02-21 21:33:53,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-02-21 21:33:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-21 21:33:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-02-21 21:33:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-21 21:33:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-02-21 21:33:53,668 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 48 [2021-02-21 21:33:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:53,668 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-02-21 21:33:53,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 21:33:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-02-21 21:33:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-21 21:33:53,670 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:53,670 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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 21:33:53,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:33:53,670 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:53,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1147568426, now seen corresponding path program 3 times [2021-02-21 21:33:53,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:53,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301182862] [2021-02-21 21:33:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:54,437 WARN L202 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-21 21:33:55,389 WARN L202 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-21 21:33:58,683 WARN L202 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 2935 DAG size of output: 95 [2021-02-21 21:34:02,036 WARN L202 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 2937 DAG size of output: 97 [2021-02-21 21:34:04,391 WARN L202 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 166 DAG size of output: 126 [2021-02-21 21:34:06,685 WARN L202 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 186 DAG size of output: 126 [2021-02-21 21:34:26,571 WARN L202 SmtUtils]: Spent 19.83 s on a formula simplification. DAG size of input: 9933 DAG size of output: 142 [2021-02-21 21:34:26,573 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:26,575 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:26,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:26,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:34:26,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:26,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:34:26,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:26,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:34:26,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:26,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-21 21:34:26,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:26,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:34:26,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:26,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-21 21:34:26,912 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.4 percent of original size [2021-02-21 21:34:26,915 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.4 percent of original size 163 [2021-02-21 21:34:26,979 WARN L141 QuantifierPusher]: treesize reduction 7, result has 95.1 percent of original size [2021-02-21 21:34:26,980 WARN L147 QuantifierPusher]: treesize reduction 7, result has 95.1 percent of original size 137 [2021-02-21 21:34:27,043 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:34:27,044 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:34:27,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:27,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:27,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:27,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:27,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:27,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:27,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:34:27,123 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 21:34:27,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301182862] [2021-02-21 21:34:27,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:27,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 21:34:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955042045] [2021-02-21 21:34:27,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 21:34:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:27,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 21:34:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:34:27,126 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 11 states. [2021-02-21 21:34:27,932 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-21 21:34:28,541 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-21 21:34:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:29,259 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-02-21 21:34:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:34:29,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2021-02-21 21:34:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:29,263 INFO L225 Difference]: With dead ends: 99 [2021-02-21 21:34:29,263 INFO L226 Difference]: Without dead ends: 87 [2021-02-21 21:34:29,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:34:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-21 21:34:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-02-21 21:34:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-21 21:34:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-02-21 21:34:29,313 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2021-02-21 21:34:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:29,313 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-02-21 21:34:29,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 21:34:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-02-21 21:34:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-21 21:34:29,315 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:29,315 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:34:29,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:34:29,315 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 510850379, now seen corresponding path program 4 times [2021-02-21 21:34:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:29,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310546551] [2021-02-21 21:34:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:29,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:29,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-21 21:34:30,170 WARN L202 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-21 21:34:30,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:34:31,217 WARN L202 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-21 21:34:31,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:31,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-21 21:34:34,613 WARN L202 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 2935 DAG size of output: 95 [2021-02-21 21:34:34,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:34,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-21 21:34:54,962 WARN L202 SmtUtils]: Spent 20.23 s on a formula simplification. DAG size of input: 9685 DAG size of output: 123 [2021-02-21 21:34:54,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:54,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:34:56,486 WARN L202 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 186 DAG size of output: 110 [2021-02-21 21:34:56,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:56,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-21 21:34:58,604 WARN L202 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 179 DAG size of output: 146